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mars1129 [50]
4 years ago
8

The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls? 50 140 220 215

Mathematics
2 answers:
nalin [4]4 years ago
5 0

It would be 220 because 20 students in all, 20×20 is the 400 students. so if you just multiplied the 9 and 11 by 20, it would match up with 400 students and you would have 220 girls. (This is not how most people work this out, but I hope it helped).

Scorpion4ik [409]4 years ago
3 0

total ratio=9+11=20

number of girls=11/20*400

=220

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