The average height of four pupils is 129 cm. If the average height of three pupils is 124 cm, find the height of the fourth pupil.
|
4 pupils |
3 pupils |
Number |
4 |
3 |
Value |
129 |
124 |
Total value |
516 |
372 |
Total height of the 4 pupils
= 4 x 129
= 516 cm
Total height of the 3 pupils
= 3 x 124
= 372 cm
Height of the fourth pupil
= 516 - 372
= 144 cm
Answer(s): 144 cm