The average height of a group of 6 girls is 116 cm. When Pamela and Kathy joined the group, the average height increased by 5 cm. What is Pamela and Kathy's total height?
| |
6 girls |
8 girls |
| Number |
6 |
8 |
| Value |
116 |
121 |
| Total value |
696 |
968 |
Total number of girls after 2 more girls joined the group
= 6 + 2
= 8
New average height after 2 more girls joined the group
= 116 + 5
= 121 cm
Total height of 6 girls
= 6 x 116
= 696 cm
Total height of 8 girls
= 8 x 121
= 968 cm
Total height of Pamela and Kathy
= 968 - 696
= 272 cm
Answer(s): 272 cm
