The average height of a group of 6 boys is 119 cm. When Zane, Andy and Eric left the group, the average height decreased by 12 cm. What is Zane, Andy and Eric's total height?
| |
6 boys |
3 boys |
| Number |
6 |
3 |
| Value |
119 |
107 |
| Total value |
714 |
321 |
Total number of boys after 3 boys left the group
= 6 - 3
= 3
New average height after 3 boys left the group
= 119 - 12
= 107 cm
Total height of 6 boys
= 6 x 119
= 714 cm
Total height of 3 boys
= 3 x 107
= 321 cm
Total height of Zane, Andy and Eric
= 714 - 321
= 393 cm
Answer(s): 393 cm
