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Question

Aruna has only Rs1 and Rs2 coins with her. if the total number of coins that she has is 50 and the amount of money with her is Rs75 then the number of Rs1 and Rs2 coins are respectively

A
35and15
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B
35and20
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C
15and35
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D
25and25
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Solution

The correct option is D 25and25
Let the number of Rs1 coins = x
And the number of Rs2 coin = y
So, according to the question
x+y=50...(i)
1x+2y=75....(ii)
Subtracting equations (i) From (ii)
y=25
Substituting value of y in (i)
x=25
So, y=25 and x=25

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