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 ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3
Total no. of student = 432
No. of boys = 5/6 × 432 = 240
No. of girls = 432 - 240 = 192
No. of boys = 240 + 12 = 252
Let no. of girls admitted = x
252/192+x = 7/6
x = 24