A survey was conducted with some pupils.
29 of them chose aerobic as their favourite sport.
35 of the remaining pupils chose badminton.
12 of those left chose jogging and the last 56 chose tennis. How many more pupils chose badminton than aerobic?
| Aerobic |
Badminton |
Jogging |
Tennis |
| 2x5 |
7x5 |
| |
3x7 |
2x7 |
| |
|
1x7 |
1x7 |
| |
|
|
56 |
| 10 u |
21 u |
7 u |
7 u |
The number of pupils who chose badminton, jogging and tennis is repeated. Make the number of pupils who chose badminton, jogging and tennis the same. LCM of 7 and 5 is 35.
Number of pupils who chose jogging = 7 u
7 u = 56
1 u = 56 ÷ 7 = 8
Number of more pupils who chose badminton than aerobic
= 21 u - 10 u
= 11 u
= 11 x 8
= 88
Answer(s): 88
