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A man has only 20-paise and 25-paise coins in a bag. If he has 50 coins in all totaling to Rs.10.25, then the number of 20-paise coins is

Correct Answer: 45

Explanation:

Let number of 20 ps coins = x and


number of 25 ps coins = y


Given total coins in the bag = 50


x + y = 50.......(1)


But the total money in the bag = Rs. 10.25


0.20x + 0.25y = 10.25


20x + 25y = 1025.........(2)


Now multiplying (1) by 25 we get


25x+25y=1250.............(3)


By solving (2) and (3)


20x + 25y = 1025;


=> x = 45;


Then, the no. of 20 ps coins are 45.


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