Lessons

General Aptitude
34.1 Probability - General Questions

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Q.

Three unbiased coins are tossed. What is the probability of getting at most two heads?

View Answer

Correct choice: D

Explanation:

Here S = {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}

Let E = event of getting at most two heads.

Then E = {TTT, TTH, THT, HTT, THH, HTH, HHT}.

∴  P(E) = n(E)/n(S) = 7/8.
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