1.

Three Unbiased Coins Are Tossed.what Is The Probability Of Getting At Least 2 Heads?

Answer»

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.

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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