Question

In class of 75 students the average age is 23 years . The average age of male students is 25 years and that of female students is 20 years . Then the ratio of male to female students is?

Answer 1

Answer:3:2

Step-by-step explanation:

Total age of 75 students = 75 × 23 = 1725

Let x be the no. of boys and y be the no. of girls.

Then, 25x + 20y = 1725   ----- (i)

And  x + y = 75   -------(ii) × 20 gives, 20x + 20y   = 1500 ---- (iii)

Subtracting (iii) from (ii) we get, x = 45 and y = 30

Required ratio = 45 : 30

                      = 3 : 2.

Answer 2

Answer:

3:2

Step-by-step explanation:

In class of 75 students the average age is 23 years . The average age of male students is 25 years and that of female st...

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