The average height of eight pupils is 122 cm. If the average height of seven pupils is 131 cm, find the height of the eighth pupil.
|
8 pupils |
7 pupils |
Number |
8 |
7 |
Value |
122 |
131 |
Total value |
976 |
917 |
Total height of the 8 pupils
= 8 x 122
= 976 cm
Total height of the 7 pupils
= 7 x 131
= 917 cm
Height of the eighth pupil
= 976 - 917
= 59 cm
Answer(s): 59 cm