Question

The average weight of 19 boys in a class is 40 kg . A new boy of weight 50 kg joins the class. Find the new average weight of the class.

Answer 1

The answer is 40.5 hope it helps you

Answer 2

to find the average we must do the following formula:

a+b/2

so,

the weight of 19 boys= 40kg

weight of a new boy= 50kg

average weight of the class= 40+50/2

=90/2

=45

THEREFORE, THE AVERAGE WWIGHT OF THE CLASS IS 45KG.

hope this helps...