school organised a picnic for students of grade 6, 7 and 8. 2/3 of the people who went on a picnic were children. If there were 120 children, how many adults were there?
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Answer:
Total number of students=80
Percentage of girls=15%
Number of girls=15% of 80
=
100
15
×80
=
10
15
×8
=
5
15
×4
=3×4=12
Number of boys=80−12=68
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