The average height of seven pupils is 120 cm. If the average height of six pupils is 113 cm, find the height of the seventh pupil.
|
7 pupils |
6 pupils |
Number |
7 |
6 |
Value |
120 |
113 |
Total value |
840 |
678 |
Total height of the 7 pupils
= 7 x 120
= 840 cm
Total height of the 6 pupils
= 6 x 113
= 678 cm
Height of the seventh pupil
= 840 - 678
= 162 cm
Answer(s): 162 cm