310 of the runners in a marathon are Koreans. 27 of the remaining runners are Greeks, 25 of the rest of the runners are Indians, 42 are Mongolians and 33 are Filipinos. How many more Koreans than Filipinos runners are there?
| Koreans |
Remaining runners |
| 3 u |
7 u |
| |
Greeks |
Rest of the runners |
| |
2 u |
5 u |
| |
|
Indians |
Mongolians |
Filipinos |
| |
|
2 u |
3 u |
| |
|
|
42 |
33 |
Total number of Mongolians and Filipinos
= 42 + 33
= 75
3 u = 75
1 u = 75 ÷ 3 = 25
Number of more Koreans runners than Filipinos runners
= 3 u - 33
= 3 x 25 - 33
= 75 - 33
= 42
Answer(s): 42
