Hi, i study in 7th grade. tomorrow is my maths xam. could someone help me with this sum.

The average height of 5 boys is 160cm. The heights of 4 boys are 152,164,156, 160. Find the height of the fifth boy?

Hi PRAKHAR !
It's a great answer that you have provided!
Keep up the good effort!
 
Cheers!

  • -1

average=sum of all the observation / no of observations

let the height of fifth boy be x 

then 152+164+156+160+x / 5=160

then adding 632+x / 5=160

or solving it

632+x=160*5=800

so 632+x=800

solving again

x=800-632=168

so the height of  fifth boy=168

  • 7
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