The average height of seven pupils is 122 cm. If the average height of six pupils is 123 cm, find the height of the seventh pupil.
|
7 pupils |
6 pupils |
Number |
7 |
6 |
Value |
122 |
123 |
Total value |
854 |
738 |
Total height of the 7 pupils
= 7 x 122
= 854 cm
Total height of the 6 pupils
= 6 x 123
= 738 cm
Height of the seventh pupil
= 854 - 738
= 116 cm
Answer(s): 116 cm