The average height of a group of 4 boys is 127 cm. When Ahmad, Oscar and Peter joined the group, the average height increased by 8 cm. What is Ahmad, Oscar and Peter's total height?
| |
4 boys |
7 boys |
| Number |
4 |
7 |
| Value |
127 |
135 |
| Total value |
508 |
945 |
Total number of boys after 3 more boys joined the group
= 4 + 3
= 7
New average height after 3 more boys joined the group
= 127 + 8
= 135 cm
Total height of 4 boys
= 4 x 127
= 508 cm
Total height of 7 boys
= 7 x 135
= 945 cm
Total height of Ahmad, Oscar and Peter
= 945 - 508
= 437 cm
Answer(s): 437 cm
