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JAMB Mathematics 1985 Question 44

Question 44

Probability

A bag contains 4 white balls and 6 red balls. Two balls are taken from the bag without replacement. What is the probability that they are both red?

  1. A.1/3
  2. B.2/9
  3. C.2/15
  4. D.1/5
  5. E.3/5.
Show the answer and explanation

Answer: A (1/3)

Explanation

P(first red) = 6/10 and P(second red) = 5/9, so P(both red) = 6/10 × 5/9 = 1/3.