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A man has 25 paise, 50 paise and 1 Rupee coins. There are 220 coins in all and the total amount is 160. If there are thrice as many 1 Rupee coins as there are 25 paise coins, then what is the number of 50 paise coins?

Question

A man has 25 paise, 50 paise and 1 Rupee coins. There are 220 coins in all and the total amount is 160. If there are thrice as many 1 Rupee coins as there are 25 paise coins, then what is the number of 50 paise coins?

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Solution

Let's denote:

  • The number of 25 paise coins as x
  • The number of 50 paise coins as y
  • The number of 1 Rupee coins as z

From the problem, we have the following three equations:

  1. x + y + z = 220 (since there are 220 coins in total)
  2. 0.25x + 0.50y + z = 160 (since the total amount is 160 Rupees)
  3. z = 3x (since there are thrice as many 1 Rupee coins as there are 25 paise coins)

We can substitute equation 3 into equations 1 and 2 to get:

  1. x + y + 3x = 220
  2. 0.25x + 0.50y + 3x = 160

Solving these equations gives:

  1. 4x + y = 220
  2. 3.25x + 0.50y = 160

Multiplying equation 2 by 2 gives:

6.5x + y = 320

Subtracting equation 1 from this gives:

2.5x = 100

So, x = 40.

Substituting x = 40 into equation 1 gives:

4*40 + y = 220 160 + y = 220 y = 220 - 160 = 60

So, the number of 50 paise coins is 60.

This problem has been solved

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