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Question

There are 6 boys and 8 girls in a class. How many girls should be added to make the ratio of number of boys to the number of girls as 1 : 2 ?


A

5
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B

4
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C

3
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D

2
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Solution

The correct option is A
4
Present Ratio = 6 : 8 3 : 4

Let the new number of girls be x
It is given, the ratio of number of boys to the number of girls after girls have been added is 1 : 2

6 : x :: 1 : 2
6x=12
      x=12
Therefore, the new number of girls = 12

The number of new girls added = 12 - 8 = 4

Mathematics

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