93. Another question on telephone bill. Every item is rounded to the nearest dollar. Then add them up to get an estimated amount. Ask under what condition, is the estimated amount > the actual total. (1) half of the items is rounded UP to the whole dollar.(2) there are 17 items in the bill. 若想估计值>实际值,那么(五入的部分数值)要大于(四舍的部分数值),注意,此处不是个数 条件1,一半项目“五入”了,单有个数,没有数值,不充分。(好比只有2项,一个8.9,一个1.4,估计值是10,实际值是10.3) 条件2,一共17项。无其他条件,不充分 两条件一起考虑,一共17项,一半的项目“五入”了,还是没涉及数值,不充分。
------------------------------------------------------------------------------ 這個題目沒看到懂。 題目說:Every item is rounded to the nearest dollar after that...it said half of the items is rounded UP to the whole dollar what does "whole dollar" mean? Can anyone answer my questions. Tks~
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