A prison of 10,000 inmates has enough food to feed them all for 50 days. After 10 days some of the inmates leave and the food is now enough for the same period of 50 days as before. How many of them left?	Choose the correct choice from the following options:  A) 3,000  B) 2,200  C) 2,000  D) 1,000  E) 200
10,000 --- 50   10,000 --- 40   x --- 50   x*50 = 10,000*40   x = 8,000   10,000   --------   2,000   Answer = 2,000
<result>C</result>
A prison of 10,000 inmates has enough food to feed them all for 50 days. After 10 days some of the inmates leave and the food is now enough for the same period of 50 days as before. How many of them left?