Question 31
ProbabilityA box contains 5 red, 3 green and 4 blue balls. A boy is allowed to take away two balls from the box. What is the probability that one is green the other is blue?
- A.2/11
- B.5/12
- C.8/12
- D.7/11
Show the answer and explanation
Answer: A (2/11)
Explanation
Green then blue or blue then green: 3/12 × 4/11 + 4/12 × 3/11 = 24/132 = 2/11.