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In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?

Correct answer: C. 150

  • A. 50
  • B. 100
  • C. 150
  • D. 200

Explanation

Let the numbers of 25-paisa, 10-paisa and 5-paisa coins be k, 2k and 3k. Their total value is 25k + 10(2k) + 5(3k) = 60k paisa = Rs.0.60k; since the total is Rs.30, k = 50. Hence the number of 5-paisa coins is 3k = 150. The likely wrong choice is 100, which uses only 2k and forgets that the 5-paisa group is 3 parts.

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