Random Variables and Probability Distributions
Telangana Open School (TOSS) · Class 12 · Mathematics
All formulas from Random Variables and Probability Distributions in Telangana Open School (TOSS) Class 12 Mathematics. Key equations, constants, and identities for board exam preparation.
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Formulas
Mean, Variance, Standard Deviation
μ = Σ xᵢP(X=xᵢ)
σ² = Σ (xᵢ - μ)²P(X=xᵢ)
σ² = Σ xᵢ²P(X=xᵢ) - μ²
σ = √σ²
Binomial Distribution
P(X=r) = ⁿCᵣ pʳ qⁿ⁻ʳ
Mean = np
Variance = npq
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