In a college, the ratio of boys to girls is 31 : 23 respectively. When 75 more girls join the college, this ratio becomes 124 : 107. How many more girls should join the college to make the number of boys and girls equal?
In a college, the ratio of boys to girls is 31 : 23 respectively. When 75 more girls join the college, this ratio becomes 124 : 107. How many more girls should join the college to make the number of boys and girls equal?
A75
B90
C60
D85
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Correct answer is: 85
Explanation:
Let the number of boys initially = 31x
=> Number of girls = 23x
Acc to ques,
= 3317x = 2852x + 9300
= 3317x - 2852x = 465x = 9300
=> Number of boys =
Number of girls =
Number of girls who should join the college to make number of boys and girls equal = 620 - 535
= 85
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