The ratio of the 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 increases by 12 and the ratio of the boys to girls changes to 7 : 6. The number of new girls admitted is:
- 12
- 14
- 24
- 20
Answer
Option 3 : 24
The ratio of the number of boys and girls
