新gre数学十大易错题型7
A certain teacher has a total ofat least 110 students enrolled in her classes.if the teachers has anaverage (arithmetic mean) of exactly 27 students enrolled per class.what is the least possible number of classes that the teacher couldhave?
a.3 b.4 c.5 d.6 e.7
我觉得这道题就是用110除以27就好了,可是答案是选c的
110/27=4.04,如果是4个班,那么总人数为108,还剩2个。当然是5个班了。
新gre数学十大易错题型8
A delivery service charges $0.02 per ounce for the first 16 ounces ofa shipment and $0.15 for each additional ounce of theshipment,(1pound=16ounce)
the delivery charges for x shipments weighing a combimed total of the pounds vs 567.00