The average height of eight pupils is 121 cm. If the average height of seven pupils is 116 cm, find the height of the eighth pupil.
|
8 pupils |
7 pupils |
Number |
8 |
7 |
Value |
121 |
116 |
Total value |
968 |
812 |
Total height of the 8 pupils
= 8 x 121
= 968 cm
Total height of the 7 pupils
= 7 x 116
= 812 cm
Height of the eighth pupil
= 968 - 812
= 156 cm
Answer(s): 156 cm