Question

The ratio of the number if girls to the numbers of boys in a school of 720 students is 3:5.If 18 new boys are admitted in the school,find how many new girls may be admitted so that the ratio of number of girls to the number of boys may change to 2:5. PLZ explain also.

Answer 1

$number \: of \: boys \: = 720 \times \frac{7}{12} = 420$

$number \: of \: girls \: = 720 - 420 = 300$

The required number of girls to be admitted

$= 420 - 300 = 120$

Answer 2

Answer:

120ans.........

Step-by-step explanation:

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