Exams › SSC CGL (Prelims) › Maths
A money bag contains one-rupee, five-rupee, and ten-rupee coins in the ratio 3:5:7 respectively. If the total amount in the bag is ₹980, then find the number of ₹10 coins.
- 69
- 70
- 71
- 68
Correct answer: 70
Solution
If the numbers of coins are \(3x, 5x, 7x\), then total value is \(1\cdot 3x + 5\cdot 5x + 10\cdot 7x = 3x+25x+70x=98x\). Since the total amount is ₹980, \(98x=980\), so \(x=10\). Thus the number of ₹10 coins is \(7x=70\).
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