The average height of a group of 6 boys is 150 cm. When Ryan, Luke and Oscar left the group, the average height decreased by 11 cm. What is Ryan, Luke and Oscar's total height?
| |
6 boys |
3 boys |
| Number |
6 |
3 |
| Value |
150 |
139 |
| Total value |
900 |
417 |
Total number of boys after 3 boys left the group
= 6 - 3
= 3
New average height after 3 boys left the group
= 150 - 11
= 139 cm
Total height of 6 boys
= 6 x 150
= 900 cm
Total height of 3 boys
= 3 x 139
= 417 cm
Total height of Ryan, Luke and Oscar
= 900 - 417
= 483 cm
Answer(s): 483 cm
