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Ratio and Proportion

Q1:

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?

A 50

B 100

C 150

D 200

ANS:C - 150

Let the number of 25 p, 10 p and 5 p coins be x, 2x, 3x respectively.

Then, sum of their values = Rs. 25x + 10 x 2x + 5 x 3x = Rs. 60x
100 100 100 100
60x = 30     x = 30 x 100 = 50.
100 60
Hence, the number of 5 p coins = (3 x 50) = 150.



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