The average height of a group of 4 boys is 148 cm. When Ryan, Paul and Seth joined the group, the average height increased by 7 cm. What is Ryan, Paul and Seth's total height?
| |
4 boys |
7 boys |
| Number |
4 |
7 |
| Value |
148 |
155 |
| Total value |
592 |
1085 |
Total number of boys after 3 more boys joined the group
= 4 + 3
= 7
New average height after 3 more boys joined the group
= 148 + 7
= 155 cm
Total height of 4 boys
= 4 x 148
= 592 cm
Total height of 7 boys
= 7 x 155
= 1085 cm
Total height of Ryan, Paul and Seth
= 1085 - 592
= 493 cm
Answer(s): 493 cm
