Multiple choice

A boy has a few coins of denominations $50$ paise, $25$ paise and $10$ paise in the ratio of $1 : 2 : 3$. If he total amount of the coins is Rs. $6.50$, then the number of $10$ paise coins is -

  1. $5$
  2. $10$
  3. $15$
  4. $20$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let the number of coins be x, 2x, 3x. Total value = 0.50(x) + 0.25(2x) + 0.10(3x) = 6.50. 0.50x + 0.50x + 0.30x = 6.50 => 1.30x = 6.50 => x = 5. Number of 10 paise coins = 3x = 15.

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