A survey was conducted with some pupils.
29 of them chose canoeing as their favourite sport.
35 of the remaining pupils chose swimming.
12 of those left chose aerobic and the last 28 chose rugby. How many more pupils chose swimming than canoeing?
| Canoeing |
Swimming |
Aerobic |
Rugby |
| 2x5 |
7x5 |
| |
3x7 |
2x7 |
| |
|
1x7 |
1x7 |
| |
|
|
28 |
| 10 u |
21 u |
7 u |
7 u |
The number of pupils who chose swimming, aerobic and rugby is repeated. Make the number of pupils who chose swimming, aerobic and rugby the same. LCM of 7 and 5 is 35.
Number of pupils who chose aerobic = 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Number of more pupils who chose swimming than canoeing
= 21 u - 10 u
= 11 u
= 11 x 4
= 44
Answer(s): 44
