CUET Preparation Today
CUET
-- Applied Mathematics - Section B2
Calculus
Expectation of the number of heads in 15 tosses of a coin is
7.5
3.5
5.5
8.5
The correct answer is Option (1) → 7.5
The probability of getting a head $P(H)=\frac{1}{2}$
∴ Expected value, $E(x)=n.P(H)$
$=15×\frac{1}{2}=7.5$
