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