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Recent questions in Class 10
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Olympiad-Math
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Class 10
The class marks of classes $15-35$ and $20-40$ is________
olympiad
math
ch-8
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The mean of the following data is $20.6$ , then the value of p is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
If the mean of the following distribution is $2.6$ , then the value of k is
sat
math
problem-solving-and-data-analysis
olympiad
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The mode and mean are $26.6 $ and $ 28.1$ respectively in a distribution then its median is _______
sat
math
problem-solving-and-data-analysis
olympiad
ch-8
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
In a distribution, the arithmetic mean and median are respectively $30 $ and $32$ , then its mode is ________
olympiad
math
statistics
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The times in seconds taken by $150$ athletes to run $110 \;m$ hurdle race an given below . The no.of athletes whose completed the race in less than $14.6$ seconds is __________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
If $x_i$'s are the midpoints of the class intervals of grouped data, $f_i$'s are the corresponding frequencies and I is the mean, then $ \sum (f_i x_i - \bar {x} )$ is equals to ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
Two dice are thrown simultaneously. The probability of getting six as product is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
A box of 600 electric bulks contains 12 defective bulks. One bulls is taken out at random from this box. Then the probability that it is a non- defective bulb is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
0
answers
One card is drawn from a well shiffled deck of 52 cards. Then the probability of drawing 10 of a black suit is _____
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The probability that a leap year selected at random, will contain 53 sundays is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
A bag contains 12 balls out of which x number of balls are white . If 6 more white balls are put in the bag, the probability of drawing a white ball will be double than that when the probability of drawing a white ball at random. Then the value of x is ________.
olympiad
math
probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
Two dice are thrown simultaneously. The probability o getting six as the product is ________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
On throwing two cubical dice simultaneously, the probability that the sum of the digits on the top faces of the two dice is greater than 7 or less than 7 is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The probability of getting a sum greater than 15 on throwing 3 dice is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
When three coins are tossed simultaneously, the probability of getting at least one tail is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The ratio of the probability of getting a 4 on throwing a dice and getting a sum of 10 on throwing two dice is ______
olympiad
math
probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The mean weight of 8 numbers is 15. If each number is multiplied by 2, the new mean is _____
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of 11 number is 35. If the mean of first 6 number is 32 and that of last 6 number is 37, the sixth number is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of 5 numbers is 18. If one number is excluded their mean is 16. The excluded number is ________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of marks scored by 100 students was found to be 40, Later on it was discovered that a score of 53 was misread as $83$. The correct mean is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of 5 numbers is 18. If one number is excluded , their mean is $16^{\circ}$. then the excluded number is ________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mode of a frequency distribution can be determined graphically from
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The median of a given frequency distribution is found graphically with the help of
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of a discrete frequency distribution $\large\frac{x}{f_i} $$; i=1,2,3,.n$ is given by
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 -a, x_2 - a, ....... x_n - a$ is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 +a, x_2 +a, ....... x_n +a$ is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If $\bar {x} $ is the mean of ten natural numbers $x_1,x_2,x_3......x_{10}$ , then $(x_1 - \bar {x}) +(x_2 - \bar {x})+ ..... (x_{10} - \bar {x} )$ is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If the numerator of a fraction is multiplied by 2 and its denominator is increased by 2, it becomes $\large\frac{6}{7}$. If instead we multiply by 2 and increase the numerator by 2, it reduces to $\large\frac{1}{2}$ , the fraction is :
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The ratio of two numbers is $4:1$ . If 5 is added to both the number obtained becomes $3:1$ The numbers are :
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The denominator of a fraction is 4 more than twice the numerator. When both the numerator and denominator are decreased by 6, then the denominator becomes 12 times the numerator. Then the fraction is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The sum of the numerator and denominator of a fraction is 3 less than twice the denominator . If the numerator and denominator are decreased by 1, the numerator becomes half the denominator. Then the faction is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If we add 1 to the numerator of a fraction, it reduces to $\large\frac{1}{2}$ . If we subtract 1 from its denominator it reduces to $\large\frac{1}{3}$ . Thus the fraction is _____
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The given system of equation $=3x+4y =5; \large\frac{9}{2} $$x -6y=\large\frac{15}{2}$has :
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
A system is said to be inconsistent if _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The following system of the equation represents ______ lines . $3x-4y=-7;3x-4y=-9$
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The value of 'k' for which the system $x+2y=13;(k-1)x+(k+1)y=k+2$ has no solutions is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The value of 'k' for which the system $kx+2y-1=0;5x-3y+2=0$ has no solutions is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
In the line $y= mx+c$ m represents the ______ of the line
olympiad
math
coordinate-geometry
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The line $\large\frac{x}{a} +\frac{y}{b} $$=1$ touches _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
On walking x meters towards a chiming in a horizontal line through its base, the elevation of its top changes from $30^{\circ}$ to $60^{\circ}$ . The height of the chimney is _________
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
If the angles of elevation of the top of a tower from two points at a distance of $4\;m$ and $9\;cm$ from the base of the tower and in the same straight line with it are complementary. The height of the tower is ______
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The angle of elevation of the sun , when the length of the shadow of a verticle pole is equal to its height is _____
sat
trigonometry
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The height of a tower is $10 \;m$ . Find the length of its shadow when sum's attitude makes an angle of $45^{\circ}$ the horizontal
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The height of the mountain if the elevation of its top at an unknown distance from the base is $30^{\circ}$ and at a distance $10\;km$ further off from the mountain along the same line whose where angle of elevation is $15^{\circ}$ is _____ $(\tan 15^{\circ} = 0.27)$
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The shadow of a vertical tower on level ground increases by $10\;cm$ The attitude of sun changes from the angle of elevation $45 ^{\circ}$ to $30^{circ}$ The height of the tower is _______
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
At a point on level ground, the angle of elevation of a vertical tower is found to be such that its tangent is $ \large\frac{5}{12}$ . On walking $192\;m$ towards the tower. the tangent of the angle of elevation is $\large\frac{3}{4}$. The height of the tower is
sat
trigonometry
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The angle of elevation of a jet plane from a point A on the ground is $60^{\circ}$ After a flight of $30$ seconds , the angle of elevation changes to $30^{\circ}$. If the jet plane is flying at a constant height of $3600\sqrt 3\;m$, then the speeds of the jet plane is _______
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The angles of depression of two ships from the tops of a light house are $45^{\circ}$ and $30^{\circ}$ towards east. If the ships are $100\;m$ apart, the height of the light house is _______
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The angle of elevation of a cloud from a point h meter above a lake is $\theta $. The angle of of depression of the lake is $45^{\circ}4. The height of the cloud is
olympiad
math
ch-10
trigonometry-and-its-applications
class10
asked
Nov 5, 2014
by
meena.p
1
answer
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