Correct Answer: Option A

Explanation

Sample space = {HHH, HHT, HTH, THH, TTH, THT, HTT, TTT}

Total number of possible outcomes = 2 x 2 x 2 = 8

favourable number of outcomes = 7

∴Pr(at least one head) = \(\frac {7}{8}\)

There is an explanation video available below.

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