List T consists of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S. The estimated sum of the 30 decimals, £, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the nearest integer, and each decimal in T whose tenths digit is odd is rounded down to the nearest integer; E is the sum of the resulting integers. If ![]() of the decimals in T have a tenths digit that is even, which of the following is a possible value of E - S ?
I.-16
II.6
III.10
- AI only
- BI and II only
- CI and III only
- DII and III only
- EI,II, and III
这道题题目意思明白了，但是不会做，请会的战友指导下！
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发表于 2015-10-7 09:07:40
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