The average height of a group of 5 boys is 118 cm. When Neave, David and Howard joined the group, the average height increased by 6 cm. What is Neave, David and Howard's total height?
| |
5 boys |
8 boys |
| Number |
5 |
8 |
| Value |
118 |
124 |
| Total value |
590 |
992 |
Total number of boys after 3 more boys joined the group
= 5 + 3
= 8
New average height after 3 more boys joined the group
= 118 + 6
= 124 cm
Total height of 5 boys
= 5 x 118
= 590 cm
Total height of 8 boys
= 8 x 124
= 992 cm
Total height of Neave, David and Howard
= 992 - 590
= 402 cm
Answer(s): 402 cm
