The average height of a group of 10 girls is 119 cm. When Natalie and Wendy left the group, the average height decreased by 12 cm. What is Natalie and Wendy's total height?
| |
10 girls |
8 girls |
| Number |
10 |
8 |
| Value |
119 |
107 |
| Total value |
1190 |
856 |
Total number of girls after 2 girls left the group
= 10 - 2
= 8
New average height after 2 girls left the group
= 119 - 12
= 107 cm
Total height of 10 girls
= 10 x 119
= 1190 cm
Total height of 8 girls
= 8 x 107
= 856 cm
Total height of Natalie and Wendy
= 1190 - 856
= 334 cm
Answer(s): 334 cm
