There ar are 35 student in a class . if 2/5of them are boys, find the number of girls in a class.
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Step-by-step explanation:
35 / 5 = 7
1/5 of the class = 7 students
(1 - 2/5) = 3/5 are girls
3 * (1/5) are girls
3 * 7 are girls
21 are girls
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