Question

The average of 9 numbers is 72 and the average of 4 of them is 40. what is the average of the other 5?

Answer 1

hey mate here is your answer

average of nine numbers=72
sum=9×72=648

average of 4=40
sum=4×40=160

sum of five=648-160

Answer 2

average of 9 numbers=total sum of numbers/9
72=sum of 9 numbers/9
thus, sum of 9 numbers=648
now it is also given that average of 4 of them=40
=sum of 4 numbers/4=40
thus , sum of 4 numbers =160
now sum of remaining5 numbers =648-160=488
therefore average of these 5 numbers=sum of these 5 numbers/5
=488/5=97.6
plz mark it as brianliest;):-):D:)