In a class the number of girls is 20 more than

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 :

A. 1 : 2

B. 3 : 4

C. 1 : 4

D. 3 : 5

Answer: Option B

Solution(By Examveda Team)

20% = $$\frac{1}{5}$$ = $$\frac{{6\,\, \to \,\,{\text{Girls}}}}{{5\,\, \to \,\,{\text{Boys}}}}$$
Boys : Girls
5 : 6
According to the question,
(5 + 6) units = 66
11 units = 66
1 unit = 6
Hence Boys = 6 × 5 = 30
Girls = 6 × 6 = 36
The number of girls when 4 is admitted
= (36 + 4)
= 40
Required ratio :
= 30 : 40
= 3 : 4

If the price of the commodity is increased by 50% by what fraction must its consumption be reduced so as to keep the same expenditure on its consumption?

A. $$\frac{1}{4}$$

B. $$\frac{1}{3}$$

C. $$\frac{1}{2}$$

D. $$\frac{2}{3}$$

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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 :

Solution(By Examveda Team)

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