The average height of a group of 5 boys is 145 cm. When Sean, Cole and Carl joined the group, the average height increased by 4 cm. What is Sean, Cole and Carl's total height?
| |
5 boys |
8 boys |
| Number |
5 |
8 |
| Value |
145 |
149 |
| Total value |
725 |
1192 |
Total number of boys after 3 more boys joined the group
= 5 + 3
= 8
New average height after 3 more boys joined the group
= 145 + 4
= 149 cm
Total height of 5 boys
= 5 x 145
= 725 cm
Total height of 8 boys
= 8 x 149
= 1192 cm
Total height of Sean, Cole and Carl
= 1192 - 725
= 467 cm
Answer(s): 467 cm
