Forget conventional ways of solving math questions. In PS, IVY approach is the easiest and quickest way to find the answer.

Robert tossed a fair coin 3 times. What is the probability that the coin landed heads up exactly twice?

A. 0.125

B. 0.250

C. 0.375

D. 0.750

E. 0.875

The probability is exactly same as the cion landed tail up once. That is 3*(1/2)^3 = 3/8 =0.375.

The answer is, therefore, (C).

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