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6.In a school the ratio of boys togirls is 3:5. If there are 240 boys,how many pupils are there in thatschool?A. 400 B. 640C. 144 D. 384

Answer»

Let the number of be 3x and number of girls be 5x

Then,3x = 240x = 240/3 = 80

Therefore, total number of pupil in school = 3x + 5x = 8x= 8*8 = 640

(B) is correct option



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