A survey was conducted with some pupils.
29 of them chose swimming as their favourite sport.
35 of the remaining pupils chose canoeing.
12 of those left chose volleyball and the last 49 chose soccer. How many more pupils chose canoeing than swimming?
| Swimming |
Canoeing |
Volleyball |
Soccer |
| 2x5 |
7x5 |
| |
3x7 |
2x7 |
| |
|
1x7 |
1x7 |
| |
|
|
49 |
| 10 u |
21 u |
7 u |
7 u |
The number of pupils who chose canoeing, volleyball and soccer is repeated. Make the number of pupils who chose canoeing, volleyball and soccer the same. LCM of 7 and 5 is 35.
Number of pupils who chose volleyball = 7 u
7 u = 49
1 u = 49 ÷ 7 = 7
Number of more pupils who chose canoeing than swimming
= 21 u - 10 u
= 11 u
= 11 x 7
= 77
Answer(s): 77
