# How to solve this math easily? Can you give a try?

1. 79
plusMinusposted 4 years ago

How to solve this math easily? Can you give a try?

A class contains equal number of boys and girls. Average height of boys is 62 inches and average height of the students is 60 inches. What is the average height of the girls?

2. 0
Patricia Ferreroposted 4 years ago

The average height of girls is 58 inches.
Unless it's a tricky question, of course!

1. 60
koconutzzzposted 4 years agoin reply to this

i think she's right

(x+y)/2=60
x+y=120
x=62
62+y=120
y=58

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Patricia Ferreroposted 4 years agoin reply to this

Thank you! I was just lazy to work out the whole equation...

3. 79
plusMinusposted 4 years agoin reply to this

Yes, you are right. Can you please give tips to solve this as quickly as possible

3. 79
plusMinusposted 4 years ago

Yes, right. I posted that question to solve that as quickly as possible. For better understanding, I noted this as follow:

Given, avgHeightOfBoys = 62
and, (avgHeightOfBoys + avgHeightOfGirls)/2 = 60
=> avgHeight OfBoys + avgHeightOfGirls = 60*2 = 120
=> 62 + avgHeightOfGirls = 120
=> avgHeightOfGirls = 120 - 62 = 58

4. 60
Judysuposted 4 years ago

x +62  ./  2x   =60
x + 62 =120x
that is as far as I got

working