ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!


    Question

    In a box, the ratio of green balls to yellow balls is

    3:5. If 9 balls of each colour are added, the new ratio becomes 6:9. Find the number of yellow balls in the box originally.
    A 32 Correct Answer Incorrect Answer
    B 45 Correct Answer Incorrect Answer
    C 52 Correct Answer Incorrect Answer
    D 28 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the original number of green and yellow balls be тАШ3xтАЩ and тАШ5xтАЩ, respectively. ATQ: (3x + 9)/(5x + 9) = 6/9 Or, 9 ├Ч (3x + 9) = 6 ├Ч (5x + 9) Or, 27x + 81 = 30x + 54 Or, 3x = 27 Or, x = 9 So, number of yellow balls in the box originally = 5 ├Ч 9 = 45

    Practice Next
    More Probability Questions
    ask-question