📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      A bag contains 5 brown balls, 6 white balls and 9 red

      balls. Three balls are drawn at random. Find the probability that at least two balls are red.
      A (8/19) Correct Answer Incorrect Answer
      B (10/57) Correct Answer Incorrect Answer
      C (5/38) Correct Answer Incorrect Answer
      D (6/57) Correct Answer Incorrect Answer

      Solution

      Total = 5 + 6 + 9 = 20
      Required probability = (Two red and one other) + (Three red)

      = 3 × [(9/20) × (8/19) × (11/18)] + (9/20 × 8/19 × 7/18)
      = (2376/6840) + (504/6840)
      = (2880/6840) = (24/57)

      Practice Next
      More Probability Questions

      Relevant for Exams:

      ask-question