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In a class, the number of girls is 20% more than that of the boys. The strength of the class is 66. If 4 more girls are admitted to the class, the ratio of the number of boys to that of the girls is
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- 1 : 2
- 3 : 4
- 1 : 4
- 3 : 5
Correct Option: B
Let number of boys be B.
| Then, B + | B = 66 | 100 |
| ⇒ B + | = 66 | 5 |
| ⇒ | = 66 | 5 |
| ⇒ B = | = 30 | 11 |
∴ Number of girls = 66 – 30 = 36
∴ New ratio = 30 : (36 + 4) = 30 : 40 = 3 : 4
