📢 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 35 white and some black balls. If the

      probability of drawing a black ball from the bag is 1.8 times that of drawing a white ball, find the number of black balls in the bag.
      A 65 Correct Answer Incorrect Answer
      B 63 Correct Answer Incorrect Answer
      C 62 Correct Answer Incorrect Answer
      D 67 Correct Answer Incorrect Answer

      Solution

      Number of white balls = 35 Let x be the number of black balls. Total number of balls in the bag = 35 + x Also, the probability of drawing a black ball from the bag is 1.8 times that of drawing a white ball. ⇒ x/(35 + x) = 1.8[35/(35 + x)] ⇒ x = 1.8 × 35 = 63 Hence, the number of black balls in the bag = 63

      Practice Next
      More Probability Questions

      Relevant for Exams:

      ask-question