Electrical Engineering > GATE 2017 SET-2 > Probability and Statistics
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
A
7/8
B
49/64
C
7/64
D
105/64

Correct : c

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