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2015-09-29T13:07:38+08:00

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20 = public transportation
15 = school buses
15 = walks to school

- Get the 2/5 of 50 to get the number of those who use public transportation.
     (2)(50)/5 = 100/5 = 20

- Get the 3/10 of 50.
     (3)(50)/10 = 15

- Add the number of those who uses public transportation and school buses.
     20 + 15 = 35

- Subtract its sum by 50 to get those who walk to school.
     50 - 35 = 15
 
                                                                                -KookEin
2 3 2