Question 30
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 the two balls are red?
- A.5/33
- B.5/36
- C.103/132
- D.31/36
Show the answer and explanation
Answer: A (5/33)
Explanation
There are 12 balls. P(red, red) = 5/12 × 4/11 = 20/132 = 5/33.