The average height of a group of 6 boys is 118 cm. When David, Julian and Vaidev left the group, the average height decreased by 2 cm. What is David, Julian and Vaidev's total height?
| |
6 boys |
3 boys |
| Number |
6 |
3 |
| Value |
118 |
116 |
| Total value |
708 |
348 |
Total number of boys after 3 boys left the group
= 6 - 3
= 3
New average height after 3 boys left the group
= 118 - 2
= 116 cm
Total height of 6 boys
= 6 x 118
= 708 cm
Total height of 3 boys
= 3 x 116
= 348 cm
Total height of David, Julian and Vaidev
= 708 - 348
= 360 cm
Answer(s): 360 cm
