30 girls and boys have planned for a picnic there is a ratio of 3 girls to 7 boys how many boys are there
HappyHuman:
Is it 30 girls?
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Let the girls be 3x
boys = 7x
total = 7x+3x = 30
⇒ 10x = 30
⇒ x = 30/10
⇒ x = 3
Number of boys = 7*3 = 21
boys = 7x
total = 7x+3x = 30
⇒ 10x = 30
⇒ x = 30/10
⇒ x = 3
Number of boys = 7*3 = 21
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