A coin is thrown 3 times in the air. What is the probability that one head is followed by two tails?

A 12
B 14
C 18
D 56

Correct Answer: 18

The occurrence of 1H & 2T are: HTT, THT, TTH, so, n(A) = 3 Total favourable cases while a coin tossed thrice is n (S) = 23 = 8 Therefore probability of getting 2H & 1T is P(A) = 3/8.
Bissoy MCQ
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