CAIE: A Level - Mathematics 9709 - Probability and Statistics 1

Binomial Distribution / Mean and Variance of a Binomial Distribution

KEYPOINTS:

Binomial Distribution is written as X ~ B(n, p)
P(X = r) = ⁿC_r p^r (1 – p)^{n – r} , r = 0, 1, 2, 3, …
Mean = E(X) = μ = np
Variance = Var(X) = σ² = np(1 – p)

Past Papers Topic Wise Questions A Level: Mathematics 9709 - Probability and Statistics 1 Binomial Distribution | Mean and Variance of a Binomial Distribution

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