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1. In a class , the number of girls is 20% more than that of 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. 1:2
  • C. 1:2
  • D. 1:2

Answer: Option D

Explanation:

Correct option is A)

Let the number of boys be x.
Then, number of girls = 120% of x 100120​×x=56x​
Given, x+56x​=66⇒511x​=66⇒x=30
∴Numberofboys=30,numberofgirls=56×30​=36
If 4 more girls are admitted then new number of girls = 40
∴ Required ratio = 30:40 = 3:4

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