The average height of a group of 5 boys is 121 cm. When Julian, Perry and Peter joined the group, the average height increased by 8 cm. What is Julian, Perry and Peter's total height?
| |
5 boys |
8 boys |
| Number |
5 |
8 |
| Value |
121 |
129 |
| Total value |
605 |
1032 |
Total number of boys after 3 more boys joined the group
= 5 + 3
= 8
New average height after 3 more boys joined the group
= 121 + 8
= 129 cm
Total height of 5 boys
= 5 x 121
= 605 cm
Total height of 8 boys
= 8 x 129
= 1032 cm
Total height of Julian, Perry and Peter
= 1032 - 605
= 427 cm
Answer(s): 427 cm
