If three unbiased coins are tossed, find th..

Question 1 Report

If three unbiased coins are tossed, find the probability that they are all heads

\frac{1}{2}

\frac{1}{3}

\frac{1}{9}

\frac{1}{8}

Answer Details

P(H) =

\frac{1}{2}

and P(T) =

\frac{1}{2}

Using the binomial prob. distribution,
(H + T)3 = H3 + 3H2T1 + 3HT2 + T3
Hence the probability that three heads show in a toss of the three coins is H3
= (

\frac{1}{2}

)3
=

\frac{1}{8}

Read lesson note on Probability (WAEC)

Probability

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