CUET Preparation Today
CUET
-- Applied Mathematics - Section B2
Probability Distributions
The probability distribution of a discrete random variable X is :
Then E(X) is equal to :
6
4
3
-5
The correct answer is Option (2) → 4
$E(X)=∑X.P(X)$
$=30.\frac{1}{5}+10.\frac{3}{10}+(-10).\frac{1}{2}$
$=6+3-5$
$=4$
