Three unbiased coins are tossed.What is the probability of getting at least 2 heads?

Bijay Kumar • 5.24K Points
Tutor III Math

Q. Three unbiased coins are tossed.What is the probability of getting at least 2 heads?

(A) 1/4
(B) 1/2
(C) 3/4
(D) 1/3

Correct Answer - Option(B)

Explanation by: Bijay Kumar

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

Let E = event of getting at least two heads = {THH, HTH, HHT, HHH}.

P(E) = n(E) / n(S)

      = 4/8= 1/2

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