📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!


    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

    Relevant for Exams:

    ask-question

    Not sure which exam is best for you Talk to our expert

    Get My Free Call