A survey was conducted with some students.
29 of them chose aerobic as their favourite sport.
35 of the remaining students chose floorball.
12 of those left chose canoeing and the last 77 chose volleyball. How many more students chose floorball than aerobic?
| Aerobic |
Floorball |
Canoeing |
Volleyball |
| 2x5 |
7x5 |
| |
3x7 |
2x7 |
| |
|
1x7 |
1x7 |
| |
|
|
77 |
| 10 u |
21 u |
7 u |
7 u |
The number of students who chose floorball, canoeing and volleyball is repeated. Make the number of students who chose floorball, canoeing and volleyball the same. LCM of 7 and 5 is 35.
Number of students who chose canoeing = 7 u
7 u = 77
1 u = 77 ÷ 7 = 11
Number of more students who chose floorball than aerobic
= 21 u - 10 u
= 11 u
= 11 x 11
= 121
Answer(s): 121
