The average height of a group of 5 girls is 139 cm. When Pamela and Penelope left the group, the average height decreased by 6 cm. What is Pamela and Penelope's total height?
| |
5 girls |
3 girls |
| Number |
5 |
3 |
| Value |
139 |
133 |
| Total value |
695 |
399 |
Total number of girls after 2 girls left the group
= 5 - 2
= 3
New average height after 2 girls left the group
= 139 - 6
= 133 cm
Total height of 5 girls
= 5 x 139
= 695 cm
Total height of 3 girls
= 3 x 133
= 399 cm
Total height of Pamela and Penelope
= 695 - 399
= 296 cm
Answer(s): 296 cm
