A survey was conducted with some pupils.
29 of them chose tennis as their favourite sport.
35 of the remaining pupils chose canoeing.
12 of those left chose aerobic and the last 14 chose gymnastics. How many more pupils chose canoeing than tennis?
| Tennis |
Canoeing |
Aerobic |
Gymnastics |
| 2x5 |
7x5 |
| |
3x7 |
2x7 |
| |
|
1x7 |
1x7 |
| |
|
|
14 |
| 10 u |
21 u |
7 u |
7 u |
The number of pupils who chose canoeing, aerobic and gymnastics is repeated. Make the number of pupils who chose canoeing, aerobic and gymnastics the same. LCM of 7 and 5 is 35.
Number of pupils who chose aerobic = 7 u
7 u = 14
1 u = 14 ÷ 7 = 2
Number of more pupils who chose canoeing than tennis
= 21 u - 10 u
= 11 u
= 11 x 2
= 22
Answer(s): 22
