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