the ratio of the number of boys to the number of girls in a school is 5:7. If there are 600 students in the school, how many girls are there?

the ratio of the number of boys to the number of girls in a school is 5:7. If there are 600 students in the school, how many girls are there?
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The ratio 5:7 means that out of 12 pupils, 5 are boys and 7 are girls; so in 600 (50*12) there are 5*50 boys and 7*50=350 girls.
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