Question

    A and B started a retail store with initial investments

    in the ratio 7:8 and their annual profits were in the ratio 3:4. If A invested the money for 9 months, then for how many months did B invest his money? 
    A 10.5 Correct Answer Incorrect Answer
    B 8 Correct Answer Incorrect Answer
    C 7.5 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer

    Solution

    Suppose A invested Rs. 7x for 9 months and B invested 8x for y months then, ⇒  (7x × 9)/(8x × y) = 3/4 ⇒  y = (63x × 4)/(8x × 3) ⇒  y = 252x/24x ⇒  y = 10.5

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