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  1. The ratio of the earnings of P and Q is 9:10. If the earnings of P increases by one-fourth and the earnings of Q decreases by one-fourth, then find the new ratio of their earnings?
    2. A.
    2:3
    B.
    3:2
    C.
    4:3
    D.
    3:4
    E.
    None of these

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    Answer : Option B

    Explanation :

    Let the earnings of P and Q be 9x and 10x respectively.
    New ratio = [9x + 1/4 (9x)]/[10x - 1/4 (10x)]
    => 9*(1 + 1/4)/10*(1 - 1/4)
    => 9/10 * (5/4)/(3/4) = 3/2

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