The average height of a group of 6 girls is 138 cm. When Jaslyn and Cindy joined the group, the average height increased by 9 cm. What is Jaslyn and Cindy's total height?
| |
6 girls |
8 girls |
| Number |
6 |
8 |
| Value |
138 |
147 |
| Total value |
828 |
1176 |
Total number of girls after 2 more girls joined the group
= 6 + 2
= 8
New average height after 2 more girls joined the group
= 138 + 9
= 147 cm
Total height of 6 girls
= 6 x 138
= 828 cm
Total height of 8 girls
= 8 x 147
= 1176 cm
Total height of Jaslyn and Cindy
= 1176 - 828
= 348 cm
Answer(s): 348 cm
