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Question

A school has a student population of 560. The number of girls is 1427% of the number of boys. How many girls are in the school?
  1. 100
  2. 70
  3. 140
  4. 80

A
70
B
80
C
100
D
140
Solution
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Given that the total student population of the school is 560 and the number of girls is 1427% of the number of boys.
Let the total number of boys in the school be B.
Hence, number of girls =1427%×B=1007%×B
17×B=B7
Also, total number of boys + total number of girls = Total students
B+B7=560
8B7=560
B=560×78=490

So, number of girls =560490=70

Hence, there are 70 girls in the school.

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