Question

three unbiased coins are tossed simultaneously find the probability of getting I) exactly two heads ii) at least two heads iii) at most two heads​

Answer 1

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

1. P(exactly two heads) = 3/8
2. P(at least two heads) = 4/8 = 1/2
3. P(atmost two heads) = 7/8

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