John tossed a fair coin 3 times. What is the probability that the outcome was “tails” exactly twice?

John tossed a fair coin 3 times. What is the probability that the outcome was “tails” exactly twice?

A. 1/8
B. 1/4
C. 3/8
D. 1/2
E. 9/10

Answer: C

Source: EMPOWERgmat

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