310 of the runners in a marathon are Koreans. 47 of the remaining runners are Filipinos, 13 of the rest of the runners are Japanese, 43 are Greeks and 21 are Vietnamese. How many more Koreans than Vietnamese runners are there?
| Koreans |
Remaining runners |
| 3 u |
7 u |
| |
Filipinos |
Rest of the runners |
| |
4 u |
3 u |
| |
|
Japanese |
Greeks |
Vietnamese |
| |
|
1 u |
2 u |
| |
|
|
43 |
21 |
Total number of Greeks and Vietnamese
= 43 + 21
= 64
2 u = 64
1 u = 64 ÷ 2 = 32
Number of more Koreans runners than Vietnamese runners
= 3 u - 21
= 3 x 32 - 21
= 96 - 21
= 75
Answer(s): 75
