A school has 630 students. The ratio of the number of boys to the number of girls is 3:2. This ratio changes to 7:5 after the admission of 90 new students . Find the number of newly admitted boys.
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the ratio is 3:2 and total students are 630 so first we divide 630/5 the answer will be 122 and then multiply 122*3 so the answer will be 366 that is 366 are Boys and 244 are girls now the new students are 90 and 630+90=720 and ratio is 7:5 so divide 720/12=60 so multiply 60*7 the number will become 420 then substract 420-366=54 so the number of newly admitted boys are 54... I hope it may help you!!
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