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Recent questions tagged p215
Questions
If $\overrightarrow{a}=\hat i+\hat j+2\hat k\;and\;\overrightarrow{b}=2\hat i+\hat j-2\hat k,$then find the unit vector in the direction of $\;2\overrightarrow{ a}- \overrightarrow{b}$
cbse
class12
ch10
q2ii
p215
exemplar
easy
sec-a
math
asked
May 24, 2013
by
meena.p
1
answer
In a hurdle race a player has to cross $10$ hurdles. The probability that he will clear each hurdle is $\large\frac{5}{6}$. What is the probability that he will knock down less than $2$ hurdles.
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q6
asked
Apr 21, 2013
by
poojasapani_1
1
answer
The overall percentage of passes in a certain examination is $80$.If $6$ candidates appear in the examination what is the probability that atleast $5$ pass the examination.
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q5
modelpaper
oct-2007
asked
Apr 21, 2013
by
poojasapani_1
1
answer
Four coins are tossed simultaneously .what is the probability of getting at most two heads
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q4
q4-3
modelpaper
mar-2008
asked
Apr 21, 2013
by
poojasapani_1
1
answer
Four coins are tossed simultaneously.what is the probability of getting at least two heads
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q4
q4-2
modelpaper
mar-2008
asked
Apr 21, 2013
by
poojasapani_1
1
answer
Four coins are tossed simultaneously .what is the probability of getting exactly $2$ heads
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q4
q4-1
modelpaper
mar-2008
asked
Apr 21, 2013
by
poojasapani_1
1
answer
If on an average $1$ ship out of $10$ do not arrive safely to ports. Find the mean and the standard deviation of ship returning safely out of a total of $500$ ships
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q3
asked
Apr 20, 2013
by
poojasapani_1
1
answer
A die is thrown $120$ times and getting $1$ or $5$ is considered a success.Find the mean and variance of the number of successes.
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q2
asked
Apr 20, 2013
by
poojasapani_1
1
answer
The mean of a binomial distribution is $6$ and its standard deviation is $3$. Is this statement true or false?comment?
tnstate
class12
bookproblem
ch10
sec-1
exercise10-3
p215
q1
asked
Apr 20, 2013
by
poojasapani_1
1
answer
Find the sine of the angle between the vectors $\overrightarrow{a}=3\hat i+\hat j+2\hat k$ and $\overrightarrow{b}=-2\hat i+2\hat j+4\hat k.$
cbse
class12
ch10
q11
p215
exemplar
easy
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
If $\overrightarrow{a}+\overrightarrow{b}+\overrightarrow{c}=0,$show that $\overrightarrow{a} \times \overrightarrow{b}=\overrightarrow{b} \times \overrightarrow{c} =\overrightarrow{c} \times \overrightarrow{a}$.Interpret the result geometrically?
cbse
class12
ch10
q10
p215
short-answer
exemplar
math
sec-b
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Find the angle between the vectors $2\hat i\;-\hat j\;-\hat k$ and $3\hat i\;+4\hat j\;+\hat k$.
cbse
class12
ch10
q9
p215
exemplar
easy
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
FInd a vector of magnitude 6 ,which is perpendicular to both the vectors $2\hat i-\hat j+2\hat k$ and $4\hat i-\hat j+3\hat k.$
cbse
class12
ch10
q8
p215
exemplar
easy
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
A vector $\overrightarrow{r}$ has magnitude 14 and direction ratios 2,3,-6.Find the direction cosines and components of $\overrightarrow{r}$,given that $\overrightarrow{r}$ makes an acute angle with x-axis.
cbse
class12
ch10
q7
p215
exemplar
medium
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
A vector $\overrightarrow{r}$ is inclined at equal angles to the three axes.If the magnitude of $\overrightarrow{r}$ is $2\sqrt 3$ units,find $\overrightarrow{r}.$
cbse
class12
ch10
q6
p215
short-answer
exemplar
easy
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Using vectors,find the value of k such that the points $(k,-10,3),(1,-1,3)$ and $(3,5.3)$ are collinear.
cbse
class12
ch10
q5
p215
exemplar
medium
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
If $\overrightarrow{a}$ and $\overrightarrow{b}$ are the position vectors of $A$ and $B$,respectively,find the position vector of a point $C$ in $BA$ produced such that $BC=1.5BA$.
cbse
class12
ch10
q4
p215
exemplar
medium
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Find a unit vector in the direction of $\overrightarrow{PQ},$where $P$ and $Q$ have co-ordinates $(5,0,8)$ and $(3,3,2)$,respectively.
cbse
class12
ch10
q3
p215
exemplar
easy
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
If $\overrightarrow{a}=\hat i-\hat j+2\hat k\;and\;\overrightarrow{b}=2\hat i-\hat j-2\hat k,$then find the unit vector in the direction of $ 6 \overrightarrow{b} $
cbse
class12
ch10
q2
p215
exemplar
easy
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Find the unit vector in the direction of sum of vectors $\overrightarrow{a}=2\hat i+\hat j+\hat k\;and\;\overrightarrow{b}=2\hat j-\hat k$
cbse
class12
ch10
q1
p215
exemplar
easy
sec-a
math
asked
Jan 16, 2013
by
sreemathi.v
1
answer
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