In a binomial distribution for n trials with probability of success p and failure q, the probability of exactly r successes is:
In a binomial distribution for n trials with probability of success p and failure q, the probability of exactly r successes is:
- A. ⁿCᵣ pʳ qⁿ⁻ʳ
- B. ⁿPᵣ pʳ qⁿ⁻ʳ
- C. ⁿCᵣ pⁿ⁻ʳ qʳ
- D. pʳ qⁿ⁻ʳ
Answer: A) ⁿCᵣ pʳ qⁿ⁻ʳ
Explanation: The standard formula for binomial probability is P(X=r) = ⁿCᵣ pʳ qⁿ⁻ʳ.
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