The average height of a group of 8 boys is 144 cm. When Caden, John and Ryan left the group, the average height decreased by 10 cm. What is Caden, John and Ryan's total height?
| |
8 boys |
5 boys |
| Number |
8 |
5 |
| Value |
144 |
134 |
| Total value |
1152 |
670 |
Total number of boys after 3 boys left the group
= 8 - 3
= 5
New average height after 3 boys left the group
= 144 - 10
= 134 cm
Total height of 8 boys
= 8 x 144
= 1152 cm
Total height of 5 boys
= 5 x 134
= 670 cm
Total height of Caden, John and Ryan
= 1152 - 670
= 482 cm
Answer(s): 482 cm
