A student randomly guesses the answers to a 10-question True/False test. The probability of getting exactly 5 correct answers is: A. 1/2 B. 63/256 C. 1/10 D. 5/1024 Answer: B) 63/256 Explanation: n=10, p=1/2, q=1/2, r=5. P(X=5) = ¹⁰C₅ (1/2)⁵ (1/2)⁵ = 252 × (1/1024) = 63/256.

imo class 12 probability

A student randomly guesses the answers to a 10-question True/False test. The probability of getting exactly 5 correct answers is:

VAVidaara Admin Asked 6d ago 0 views 0 answers

A student randomly guesses the answers to a 10-question True/False test. The probability of getting exactly 5 correct answers is:

Answer: B) 63/256

Explanation: n=10, p=1/2, q=1/2, r=5. P(X=5) = ¹⁰C₅ (1/2)⁵ (1/2)⁵ = 252 × (1/1024) = 63/256.

No comments yet — start the discussion.