If a coin is tossed thrice what is the probability of getting exactly 2 heads?
Explanation:
Total possible outcomes = 2 × 2 × 2 = 8
Desired outcomes: 2 heads and 1 tail can be arranged in 3!/2! = 3 ways.
∴ P (exactly 2 heads) = 3/8
Hence, option (c).
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