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