Multiple choice

A bag contains 190 coins consisting of Rs. 5, Rs. 2 and Rs. 1 coins. If the ratio of their values be 5 : 6 : 15. Find the number of Rs. 5 coins?

  1. 10

  2. 12

  3. 8

  4. 15

  5. 18
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let number of Rs. 5, Rs. 2, Rs. 1 coins be 5x, 2x, x respectively (values ratio 5:6:15, but number of Rs. 2 coins must be even, so assume value ratio structure: let actual counts be a, b, c where 5a:2b:c = 5:6:15. From ratio 5a:2b:c = 5:6:15, we get 5a/5 = 2b/6 = c/15. Simplifying: a = b/3, c = 3b. If b = 30, then a = 10, c = 90. Total = 10 + 30 + 90 = 130 ≠ 190. Alternative: value ratio means actual values are 5k, 6k, 15k. So 5a = 5k → a = k. 2b = 6k → b = 3k. c = 15k. Total: k + 3k + 15k = 19k = 190 → k = 10. Therefore a = 10 Rs. 5 coins. Option A is correct.

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