The average height of seven students is 120 cm. If the average height of six students is 135 cm, find the height of the seventh student.
|
7 students |
6 students |
Number |
7 |
6 |
Value |
120 |
135 |
Total value |
840 |
810 |
Total height of the 7 students
= 7 x 120
= 840 cm
Total height of the 6 students
= 6 x 135
= 810 cm
Height of the seventh student
= 840 - 810
= 30 cm
Answer(s): 30 cm