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30% of the pupils in a class are boys.there are 21 girls.how many pupils are there in the class in all?
11 years ago

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Answered by Ms. Sue
0.7x = 21
x = 30

30 - 21 = ?
11 years ago
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30% of the pupils in a class are boys.there are 21 girls.how many pupils are there in the class in all?

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