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