A survey was conducted with some pupils.
29 of them chose jogging as their favourite sport.
35 of the remaining pupils chose basketball.
12 of those left chose golf and the last 77 chose tennis. How many more pupils chose basketball than jogging?
Jogging |
Basketball |
Golf |
Tennis |
2x5 |
7x5 |
|
3x7 |
2x7 |
|
|
1x7 |
1x7 |
|
|
|
77 |
10 u |
21 u |
7 u |
7 u |
The number of pupils who chose basketball, golf and tennis is repeated. Make the number of pupils who chose basketball, golf and tennis the same. LCM of 7 and 5 is 35.
Number of pupils who chose golf = 7 u
7 u = 77
1 u = 77 ÷ 7 = 11
Number of more pupils who chose basketball than jogging
= 21 u - 10 u
= 11 u
= 11 x 11
= 121
Answer(s): 121