. An unbiased coin is tossed 5 times Suppose that a variable X
is assigned the value k when k consecutive heads are obtained for k = 3,4,5,
otherwise X takes the value - 1 . Then the expected value of X , is :
A: 1/8
B: 316
C: - 18
D: - 316
Best Answer
Explanation:
It is known that if a coin is tossed n times then the total sample space is2n .
It has been given that the coin is tossed 5 times so the total sample space is 2s=32.
Final Answer:
Hence, Option (A) is correct which is 1/8.
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