the average age of a class is 15.8 . The avereage age of the boys is 16.5 years and that of girls is 15.4 .What is the ratio of boys to girls in the class?
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Answer:2:3
Step-by-step explanation:
Let the no. Of boy be x
And that of girls be y
So, sum of boy's age =16.5x
And girl's age = 15.4y
A/q
15.8(x+y)=16.4x+15.4y
15.8y-15.4y=16.4x-15.8x
0.4y=0.6x
X/y=2/3
2:3
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