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    Question

    In one box, three different types of old coins are in

    the ratio of 3: 5: 7, the value of old coins is Rs. 1, 5 and 10 rupees respectively. If the total value of coins in the box is Rs 294, then tell the number of old coins of Rs 10.
    A 22 Correct Answer Incorrect Answer
    B 24 Correct Answer Incorrect Answer
    C 21 Correct Answer Incorrect Answer
    D 23 Correct Answer Incorrect Answer

    Solution

    Let the number of coins of Rs. 1, 5, and 10 rupees be 3x, 5x, and 7x respectively Total value of coins = (3x x 1) + (5x x 5) + (7x x 10) 3x + 25x + 70x = 98x   98x = 294 x = 294/98 = 3 Total value of coins of Rs. 10 = 3 x 70 = Rs. 210 Total number of coins = 210/10 = 21

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