The average height of a group of 6 boys is 108 cm. When Neave, Ben and Perry left the group, the average height decreased by 3 cm. What is Neave, Ben and Perry's total height?
| |
6 boys |
3 boys |
| Number |
6 |
3 |
| Value |
108 |
105 |
| Total value |
648 |
315 |
Total number of boys after 3 boys left the group
= 6 - 3
= 3
New average height after 3 boys left the group
= 108 - 3
= 105 cm
Total height of 6 boys
= 6 x 108
= 648 cm
Total height of 3 boys
= 3 x 105
= 315 cm
Total height of Neave, Ben and Perry
= 648 - 315
= 333 cm
Answer(s): 333 cm
