Latest CAT Aptitude Question SOLUTION: A change making machine contains 1 rupee, 2 rupee and 5 rupee coins. The total number of coins is 300. The amount is Rs.960. If the number of 1 rupee coins and the number of 2 rupe

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A change making machine contains 1 rupee, 2 rupee and 5 rupee coins. The total number of coins is 300. The amount is Rs.960. If the number of 1 rupee coins and the number of 2 rupee coins are interchanged, the value comes down by Rs.40.What is the total number of 5 rupee coins?

Asked In CAT Devendra Marghade (12 years ago)

Solved Sanjana Patnaik Read Solution (3)

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Sanjana Patnaik  (12 years ago)

The value of the denominations : Re.1 Rs.2 Rs.5
No. of coins : x y 300-x-y
Value of the coins: 1*x+2*y+5*(300-x-y)
Thus the first equation comes to 4x+3y=540
Now when the No. of coins are rearranged as per the condition
The second equation comes to 3x+4y=580
Solving the equations, we get
x=60,y=100
Thus, the total no. of Rs.5 coin is 140

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Sanjana Patnaik  (12 years ago)

The value of the denominations : Re.1 Rs.2 Rs.5
No. of coins :

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manudixit  (12 years ago)

140 Coins
For 5

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