The average height of a group of 7 girls is 126 cm. When Roshel and Nora left the group, the average height decreased by 2 cm. What is Roshel and Nora's total height?
| |
7 girls |
5 girls |
| Number |
7 |
5 |
| Value |
126 |
124 |
| Total value |
882 |
620 |
Total number of girls after 2 girls left the group
= 7 - 2
= 5
New average height after 2 girls left the group
= 126 - 2
= 124 cm
Total height of 7 girls
= 7 x 126
= 882 cm
Total height of 5 girls
= 5 x 124
= 620 cm
Total height of Roshel and Nora
= 882 - 620
= 262 cm
Answer(s): 262 cm
