The average height of four pupils is 125 cm. If the average height of three pupils is 120 cm, find the height of the fourth pupil.
|
4 pupils |
3 pupils |
Number |
4 |
3 |
Value |
125 |
120 |
Total value |
500 |
360 |
Total height of the 4 pupils
= 4 x 125
= 500 cm
Total height of the 3 pupils
= 3 x 120
= 360 cm
Height of the fourth pupil
= 500 - 360
= 140 cm
Answer(s): 140 cm