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In a school , the number of boys and gir...

In a school , the number of boys and girls are in Ratio `5:3` Some new boys and girls took admission in the school in the ratio `5:7` Now , the total number of students in the school are 1200 and the ratio of total number of boys and girls become `7:5` Find the number of students initially .

A

a)900

B

b)960

C

c)920

D

d)1000

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