有24个brand,对每个brand的四个方面进行评估,这四个方面是ABCD,评估结果有四种,excellent,good,not good,bad,至少有几个brand的两个方面either excellent or good?
(1)至少有10个brand的两个方面是excellent
(2)至少有12个brand的三个方面是good
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提问:
If 500 is the mutiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y,which multiple of 100 is closest to x+y? (1)x小于500 (2)y小于400