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There are 420 girls and boys at a concert The ratio of girls to boys at the concert is 3 to 7 How many girls are at the concert?
Wiki User
∙ 13y ago
There are 10 students in the initial selection. (7+3)
3 is 30% of 10 and 7 is 70% of ten.
30% of 420 = 126 girls
70% of 420 = 294 boys
There are 126 girls at the concert.
Beverly Hughes
Wiki User
∙ 13y ago3+7=10 (3 and 7 are both ratio numbers)
420/10=42 (10 is the sum of both ratio)
3x42=126 girls (3 is ratio of girls)
7x42=294 boys (7 is ratio of boys)
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