Expectation of the number of heads in 15 tosses of a coin is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 7.5
The probability of getting a head $P(H)=\frac{1}{2}$
∴ Expected value, $E(x)=n.P(H)$
$=15×\frac{1}{2}=7.5$