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A box has 210 coins of denominations one-rupee and fifty paise only. The ratio of their respective values is 13 : 11. The number of one-rupee coins is
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- 65
- 66
- 77
- 78
Correct Option: D
Respective ratio of the number of coins
= 13 : 11 × 2 = 13 : 22
| ∴ Number of 1 rupee coins = | × 210 | |
| 13 + 22 |
| = | × 210 = 78 | |
| 35 |
