The average height of a group of 9 boys is 101 cm. When Vaidev, Fred and Eric left the group, the average height decreased by 4 cm. What is Vaidev, Fred and Eric's total height?
|
9 boys |
6 boys |
Number |
9 |
6 |
Value |
101 |
97 |
Total value |
909 |
582 |
Total number of boys after 3 boys left the group
= 9 - 3
= 6
New average height after 3 boys left the group
= 101 - 4
= 97 cm
Total height of 9 boys
= 9 x 101
= 909 cm
Total height of 6 boys
= 6 x 97
= 582 cm
Total height of Vaidev, Fred and Eric
= 909 - 582
= 327 cm
Answer(s): 327 cm