The average height of five pupils is 123 cm. If the average height of four pupils is 135 cm, find the height of the fifth pupil.
|
5 pupils |
4 pupils |
Number |
5 |
4 |
Value |
123 |
135 |
Total value |
615 |
540 |
Total height of the 5 pupils
= 5 x 123
= 615 cm
Total height of the 4 pupils
= 4 x 135
= 540 cm
Height of the fifth pupil
= 615 - 540
= 75 cm
Answer(s): 75 cm