The average height of five pupils is 120 cm. If the average height of four pupils is 129 cm, find the height of the fifth pupil.
|
5 pupils |
4 pupils |
Number |
5 |
4 |
Value |
120 |
129 |
Total value |
600 |
516 |
Total height of the 5 pupils
= 5 x 120
= 600 cm
Total height of the 4 pupils
= 4 x 129
= 516 cm
Height of the fifth pupil
= 600 - 516
= 84 cm
Answer(s): 84 cm