engineering recuitment GATE IN Test Series 2023-24 Mock Test Engineering Mathematics Probability and Statistics Statistical Variables
A person decides to toss a fair coin repeatedly until he gets a head. He will make at most 3 tosses. Let the random variable Y denote the number of heads. The value of var {Y}, where var{.} denotes the variance, equals.
1
\(\frac{7}{8}\)
2
\(\frac{{49}}{{64}}\)
3
\(\frac{7}{{64}}\)
4
\(\frac{{105}}{{64}}\)