313 of the runners in a marathon are Chinese. 310 of the remaining runners are Greeks, 17 of the rest of the runners are Vietnamese, 47 are Mongolians and 31 are Koreans. How many more Chinese than Koreans runners are there?
| Chinese |
Remaining runners |
| 3 u |
10 u |
| |
Greeks |
Rest of the runners |
| |
3 u |
7 u |
| |
|
Vietnamese |
Mongolians |
Koreans |
| |
|
1 u |
6 u |
| |
|
|
47 |
31 |
Total number of Mongolians and Koreans
= 47 + 31
= 78
6 u = 78
1 u = 78 ÷ 6 = 13
Number of more Chinese runners than Koreans runners
= 3 u - 31
= 3 x 13 - 31
= 39 - 31
= 8
Answer(s): 8
