The average height of seven pupils is 121 cm. If the average height of six pupils is 122 cm, find the height of the seventh pupil.
|
7 pupils |
6 pupils |
Number |
7 |
6 |
Value |
121 |
122 |
Total value |
847 |
732 |
Total height of the 7 pupils
= 7 x 121
= 847 cm
Total height of the 6 pupils
= 6 x 122
= 732 cm
Height of the seventh pupil
= 847 - 732
= 115 cm
Answer(s): 115 cm