The average height of a group of 8 girls is 148 cm. When Roshel and Lucy left the group, the average height decreased by 6 cm. What is Roshel and Lucy's total height?
| |
8 girls |
6 girls |
| Number |
8 |
6 |
| Value |
148 |
142 |
| Total value |
1184 |
852 |
Total number of girls after 2 girls left the group
= 8 - 2
= 6
New average height after 2 girls left the group
= 148 - 6
= 142 cm
Total height of 8 girls
= 8 x 148
= 1184 cm
Total height of 6 girls
= 6 x 142
= 852 cm
Total height of Roshel and Lucy
= 1184 - 852
= 332 cm
Answer(s): 332 cm
