The average height of five pupils is 122 cm. If the average height of four pupils is 139 cm, find the height of the fifth pupil.
|
5 pupils |
4 pupils |
Number |
5 |
4 |
Value |
122 |
139 |
Total value |
610 |
556 |
Total height of the 5 pupils
= 5 x 122
= 610 cm
Total height of the 4 pupils
= 4 x 139
= 556 cm
Height of the fifth pupil
= 610 - 556
= 54 cm
Answer(s): 54 cm