Random Variable Variance Formula (Jee Mains) | ExamDuo
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Random Variables and Distributions
Easy
Random Variable Variance Formula
Let 'X' be a d.r.v. assuming values x₁, x₂,.... x
n
with probabilities p₁, p₂, …..p
n
respectively. The variance X is given by:
SELECT ONE OPTION
A
E (X²)
B
E (X²) + E (X)
C
E (X²) – [E (X)]²
D
√
E (X²)- [E(X)]²
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