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allsm [11]
3 years ago
7

at a school Fair 70% of the people are under 16 years old one third of the people remaining are teachers if there are 21 teacher

s at the fair how many people are there at the fair total
Mathematics
1 answer:
PolarNik [594]3 years ago
6 0
Hello! One-third of the remaining people are teachers and there are 21 of them. Percents are parts of 100, and 100 - 70 is 30. 1/3 of of that 30% are teachers, and 10 is 1/3 of 30. 10% of those at the fair are teachers and there are 21 of them. As we see, 10% is 1/10 of 100. For this, all we need to do now is multiply 21 and 10. 21 * 10 is 210. There. A total of 210 people are at the fair.
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