Mathematics Probability & Statistics questions from JEE Main 2016.
If $A$ and $B$ are any two events such that $P(A)=\frac{2}{5}$ and $P(A\cap B)=\frac{3}{20},$ then the conditional probability, $P(A|({A}^{'}\cup {B}^{'})),$ where ${A}^{'}$ denotes the complement of $A$, is equal to :
If the mean deviation of the numbers $1, 1+d,\ldots , 1+100d$ from their mean is $255$, then a value of $d$ is :
If the standard deviation of the numbers $2,3,a$ and $11$ is $3.5$, then which of the following is true ?