Q:
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
Answer & Explanation
Answer: B) 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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