Question

The ratio of number of boys and girls in a school of 720 students is 7:5 . How many more girls should be admitted to make the ratio 1:1

Answer 1

sum of ratio= 7+5 = 12

number of boys = (7/12)*720 =420  

number of girls= REMAINING =720-420 = 300  

TO MAKE 1:1

the number of girls should be increased to 120 = 300+120 =420  

now boys:girls = 420:420 = 1:1  

so the answer is 120 girls.

Answer 2

Answer:

Girls are 120

Step-by-step explanation:

Boys =7/12×720=420

Girls =reaming

720-420=300

TO MAKE

the number of girls should be

increased to 120=300+120=420

boys:girls 420:420=1:1

the number of girls is 120