If the total number of bikes sold in 2009 was 50000, then by what number was the sales of white bikes less than that of yellow and red bikes put together?

If the total number of bikes sold in 2009 was 50000, then by what numb

1.	If the total number of bikes sold in 2009 was 50000, then by what number was the sales of white bikes less than that of yellow and red bikes put together?
A.	2,500
B.	10,000
C.	3,000
D.	5,000
Answer» B. 10,000