The mean of the number of heads in a simultaneous toss of three coins is
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → \( \displaystyle\frac{3}{2} \)
The number of heads is binomial with n = 3 and p = 1/2.
\( \displaystyle \text{Mean}=np=3\times\frac{1}{2}=\frac{3}{2} \)