List T consists of 30 positive decimals, none of which is an integerm and the sum of the 30 decimals is S. The estimated sum of the 30 decimals, E, is defined as follows. Each decimal in T whose tenth digit is even is rounded up to the neareast integer and each blah blah tenth digit is odd is rounded up to the neareast integer. E is the sum of resulting integers. If 1/3 of the decimals in T have a tenth digit that is even, which of the following is possible value of E-S
1. -16, 2. 6, 3. 10
A. 1 only
B. 1 & 2 only
C. 1 & 3 only
D. 2 & 3 only
E. 1, 2, 3
________________________________作者: napoleon 时间: 2013-5-17 21:03