Multiple choice

There are total 100 coins consisting of 20 paise, 50 paise and Rs 1 in the ratio of 7 : 8 : 5. What is the number of coins of 50 paise if the difference between the amount yielded by 20 paise and Rs 1 coin is 18?

  1. 32

  2. 40

  3. 56

  4. 64

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ratio 7:8:5, total parts = 20. Number of coins: 20p = 7×5=35, 50p = 8×5=40, Rs1 = 5×5=25. Amounts: 20p coins = 35×0.20 = Rs7, Rs1 coins = 25×1 = Rs25. Difference = 25-7 = Rs18. This matches the given condition. 50 paise coins = 40.

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