Mean Tosses for Biased Coin (Jee Mains) | ExamDuo
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Random Variables and Distributions
Hard
Mean Tosses for Biased Coin
A coin is biased so that the head is 3 times as likely to occur as tail. This coin is tossed until a head or three tails occur. If
X
denotes the number of tosses of the coin, then the mean of
X
is-
SELECT ONE OPTION
A
21
16
B
15
16
C
81
64
D
37
16
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