308.一个长方体边长是 12 16 20问题有点绕。注意看清。问的是 the area of one of the 最大两个面 (原文可能不这么说 但是问句很长 容易看错。) 我选的是320。
309.24 brands of some products, each has four properties, say A, B, C, D. Each property is rated as one of the following three categories: excellent, good, un(pleasant)?. How many brands have at least two good ratings out of the four properties?
1) exactly 10 brands have at least 2 excellent ratings.
2) exactly 12 brands have at least 3 good ratings.
I picked E, but I could be wrong. There is no way I could knock out this one in two minutes.