Because their ratio is given as 7 : 5. So, the strength of the class will be = number of boys in class + number of girls in class = 7x + 5x = 12x. Now, we know that it is given in the question that the number of boys is 8 more than the number of girls. So, the number of boys should be equal to 7x =7*4 = 28.
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The number of boys and girls in a class in the ratio 7:5. The number of boys is 70 then find the number of girls.
Given ratio = 7 : 5
Number of boys = 70
Let the number be x
So 7x : 5x
Now as given 7x = 70
x = 70/7
x = 10
And,
Number of girls = 5x = 5 × 10 = 50 girls
Answer:
Because their ratio is given as 7 : 5. So, the strength of the class will be = number of boys in class + number of girls in class = 7x + 5x = 12x. Now, we know that it is given in the question that the number of boys is 8 more than the number of girls. So, the number of boys should be equal to 7x =7*4 = 28.