Let $X$ be a set containing $10$ elements and $P(X)$ be its power set. If $A$ and $B$ are picked up at random from $P(X),$ with replacement, then the probability that $A$ and $B$ have equal number elements, is
$\frac{{\left( {{2^{10}} - 1} \right)}}{{{2^{10}}}}$
$\frac{{^{20}{C_{10}}}}{{{2^{10}}}}$
$\frac{{\left( {{2^{10}} - 1} \right)}}{{{2^{20}}}}$
$\frac{{^{20}{C_{10}}}}{{{2^{20}}}}$
From a class of $12$ girls and $18$ boys, two students are chosen randomly. What is the probability that both of them are girls
The probability of getting either all heads or all tails for exactly the second time in the $3^{rd}$ trial, if in each trial three coins are tossed, is
A dice is rolled three times, find the probability of getting a larger number than the previous number each time ?
Suppose $n \ge 3$ persons are sitting in a row. Two of them are selected at random. The probability that they are not together is
If an unbiased die, marked with $-2,-1,0,1,2,3$ on its faces, is through five times, then the probability that the product of the outcomes is positive, is :