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?
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x +62 ./ 2x =60
x + 62 =120x
that is as far as I got
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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
The average height of girls is 58 inches.
Unless it's a tricky question, of course!
koconutzzz 3 years ago
i think she's right
Patricia Ferrero 3 years ago
Thank you! I was just lazy to work out the whole equation...
plusMinus 3 years ago
Yes, you are right. Can you please give tips to solve this as quickly as possible
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