The average height of a group of 4 girls is 110 cm. When Cindy and Jen joined the group, the average height increased by 8 cm. What is Cindy and Jen's total height?
| |
4 girls |
6 girls |
| Number |
4 |
6 |
| Value |
110 |
118 |
| Total value |
440 |
708 |
Total number of girls after 2 more girls joined the group
= 4 + 2
= 6
New average height after 2 more girls joined the group
= 110 + 8
= 118 cm
Total height of 4 girls
= 4 x 110
= 440 cm
Total height of 6 girls
= 6 x 118
= 708 cm
Total height of Cindy and Jen
= 708 - 440
= 268 cm
Answer(s): 268 cm
