Question

the average age of a student of class is 15.8 if the average age of boys ratio students is 16.4 and girls is 15.4 then find the ratio of the number of boys and girls

Answer 1

Answer:

2 : 3

Step-by-step explanation:

Let x be the number of boys and y be number of girls.

(x+y)15.8 = x*16.4 + y * 15.4

x(16.4 - 15.8) = y(15.8 - 15.4)

x * 0.6 = y * 0.4

x/y = 0.4/0.6 = 2/3

=> x: y = 2: 3