The boys and girls in a college are in the ratio 3:2.If 20%of boys and 25% of the girls are adults. The what is the percentage of students who are not adults.
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Gven ratio of boys to girls is 3:2
Let ratio factor be x.
hence no of boys = 3x
no of girls = 2x
total students = 3x + 2x = 5x
No of adult students = 20% of 3x + 25% of 2x
=3x / 5 + x / 2
=11x / 10 = 1.1x
Hence no of students who are not adult = 5x - 1.1x
=3.9x
Hence % os students who are not adult = 100 * 3.9x / 5x
=78 %
Let ratio factor be x.
hence no of boys = 3x
no of girls = 2x
total students = 3x + 2x = 5x
No of adult students = 20% of 3x + 25% of 2x
=3x / 5 + x / 2
=11x / 10 = 1.1x
Hence no of students who are not adult = 5x - 1.1x
=3.9x
Hence % os students who are not adult = 100 * 3.9x / 5x
=78 %
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0
Answer:
70%
Step-by-step explanation:
is right answer 78%
78%
(C) options
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