1.

Please help us to solve the problem!

Answer»

Hey friend, here is your answer -

Let the NUMBER of students in the class be x

Number of boys in the class = 40/100 * x

                                               = 2/5x

Number of girls in the class = x - 2/5x

                                              = 3/5x

ATQ, 2/5x - 4 = 4/7 * (3/5x - 4)

⇒ 2/5x - 4 = 12/35x - 16/7

⇒ 2/5x - 12/35x = -16/7 + 4

⇒ 2/35x = 12/7

⇒ x = 12/7 * 2 * 1/35

⇒ x = 24/245

This is the CORRECT answer according to the DATA given in the question

But now even I am confused how there can be people in FRACTION.



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