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The ratio of number of boys to the numbe...

The ratio of number of boys to the number of girls in a school of 432, pupils is `5 : 4`. When some new boys and girls are admitted, the number of boys increase by 12 and the ratio of the boys to girls changes to `7 : 6`. The number of new girls admitted is:

A

12

B

14

C

24

D

20

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