defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Probability Probability of Random Experiments
A biased coin with probability p(0 < p < 1) of getting head is tossed until a head appears for the first time. if the probability that the number of tosses required is even is \(\frac{2}{5}\), then p =
1
\(\frac{1}{4}\)
2
\(\frac{1}{3}\)
3
\(\frac{2}{3}\)
4
\(\frac{3}{4}\)