The average height of four pupils is 121 cm. If the average height of three pupils is 136 cm, find the height of the fourth pupil.
|
4 pupils |
3 pupils |
Number |
4 |
3 |
Value |
121 |
136 |
Total value |
484 |
408 |
Total height of the 4 pupils
= 4 x 121
= 484 cm
Total height of the 3 pupils
= 3 x 136
= 408 cm
Height of the fourth pupil
= 484 - 408
= 76 cm
Answer(s): 76 cm