Solved papers for JEE Main & Advanced JEE Main Paper (Held On 10 April 2015)

done JEE Main Paper (Held On 10 April 2015)

• question_answer1) 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 of elements, is : JEE Main Online Paper (Held On 10 April 2015)

A) $\frac{({{2}^{10}}-1)}{{{2}^{20}}}$

B) $\frac{({{2}^{10}}-1)}{{{2}^{10}}}$

C) $\frac{^{20}{{C}_{10}}}{{{2}^{10}}}$

D) $\frac{^{20}{{C}_{10}}}{{{2}^{20}}}$