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CBSE Class 10 Answered

Three unbiased coins are simultaneously tossed. What is the probability of getting exactly two heads?
Asked by Topperlearning User | 08 Nov, 2017, 01:35: PM
answered-by-expert Expert Answer

In tossing 3 coins simultaneously, the possible outcomes are

{HHH, HHT, HTH, THT, THH, TTH, THT, HTT, TTT}

Thus, number of outcomes = 8

Let A be the event of getting exactly two heads.

Thus, number of favourable outcomes = {HHT, HTH, THH} = 3

Hence, P(A) = 3 over 8

Answered by | 08 Nov, 2017, 03:35: PM

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