Recent questions in Class 10

The class marks of classes $15-35$ and $20-40$ is________

asked Nov 10, 2014 by meena.p

1 answer

The mean of the following data is $20.6$ , then the value of p is _________

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

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 _______

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 ________

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 __________

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 ______

asked Nov 10, 2014 by meena.p

1 answer

Two dice are thrown simultaneously. The probability of getting six as product is _________

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 ______

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 _____

asked Nov 7, 2014 by meena.p

1 answer

The probability that a leap year selected at random, will contain 53 sundays is _______

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 ________.

asked Nov 7, 2014 by meena.p

1 answer

Two dice are thrown simultaneously. The probability o getting six as the product is ________

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

asked Nov 7, 2014 by meena.p

1 answer

The probability of getting a sum greater than 15 on throwing 3 dice is ______

asked Nov 7, 2014 by meena.p

1 answer

When three coins are tossed simultaneously, the probability of getting at least one tail is _______

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 ______

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 _____

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 ______

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 ________

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 ______

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 ________

asked Nov 6, 2014 by meena.p

1 answer

The mode of a frequency distribution can be determined graphically from

asked Nov 6, 2014 by meena.p

1 answer

The median of a given frequency distribution is found graphically with the help of

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

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 _________

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 _________

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 _______

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 :

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 :

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

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

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 _____

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 :

asked Nov 5, 2014 by meena.p

1 answer

A system is said to be inconsistent if _______

asked Nov 5, 2014 by meena.p

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The following system of the equation represents ______ lines . $3x-4y=-7;3x-4y=-9$

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

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

asked Nov 5, 2014 by meena.p

1 answer

In the line $y= mx+c$ m represents the ______ of the line

asked Nov 5, 2014 by meena.p

1 answer

The line $\large\frac{x}{a} +\frac{y}{b}$ $=1$ touches _________

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 _________

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 ______

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 _____

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

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 _____ $(\tan 15^{\circ} = 0.27)$

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 _______

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

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 _______

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 _______

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

asked Nov 5, 2014 by meena.p

1 answer

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