The average height of a group of 5 boys is 123 cm. When Cole, Ken and Oscar joined the group, the average height increased by 4 cm. What is Cole, Ken and Oscar's total height?
| |
5 boys |
8 boys |
| Number |
5 |
8 |
| Value |
123 |
127 |
| Total value |
615 |
1016 |
Total number of boys after 3 more boys joined the group
= 5 + 3
= 8
New average height after 3 more boys joined the group
= 123 + 4
= 127 cm
Total height of 5 boys
= 5 x 123
= 615 cm
Total height of 8 boys
= 8 x 127
= 1016 cm
Total height of Cole, Ken and Oscar
= 1016 - 615
= 401 cm
Answer(s): 401 cm
