The average height of seven students is 129 cm. If the average height of six students is 138 cm, find the height of the seventh student.
|
7 students |
6 students |
Number |
7 |
6 |
Value |
129 |
138 |
Total value |
903 |
828 |
Total height of the 7 students
= 7 x 129
= 903 cm
Total height of the 6 students
= 6 x 138
= 828 cm
Height of the seventh student
= 903 - 828
= 75 cm
Answer(s): 75 cm