The average height of four pupils is 122 cm. If the average height of three pupils is 137 cm, find the height of the fourth pupil.
|
4 pupils |
3 pupils |
Number |
4 |
3 |
Value |
122 |
137 |
Total value |
488 |
411 |
Total height of the 4 pupils
= 4 x 122
= 488 cm
Total height of the 3 pupils
= 3 x 137
= 411 cm
Height of the fourth pupil
= 488 - 411
= 77 cm
Answer(s): 77 cm