A survey was conducted with some students.
29 of them chose gymnastics as their favourite sport.
35 of the remaining students chose floorball.
12 of those left chose tennis and the last 21 chose golf. How many more students chose floorball than gymnastics?
| Gymnastics |
Floorball |
Tennis |
Golf |
| 2x5 |
7x5 |
| |
3x7 |
2x7 |
| |
|
1x7 |
1x7 |
| |
|
|
21 |
| 10 u |
21 u |
7 u |
7 u |
The number of students who chose floorball, tennis and golf is repeated. Make the number of students who chose floorball, tennis and golf the same. LCM of 7 and 5 is 35.
Number of students who chose tennis = 7 u
7 u = 21
1 u = 21 ÷ 7 = 3
Number of more students who chose floorball than gymnastics
= 21 u - 10 u
= 11 u
= 11 x 3
= 33
Answer(s): 33
