[求助]prep中几题数学不会做

DS. 1. Are at least 10 percent of the people in Country X who are 65 years old or older employed?

      a) In Country X, 11.3 percent of the population is 65 years old or older

     b) In Country X, of the population 65 years old or older, 20 percent of the men and 10 percent of the women are employed.

DS 2. If Bob produces 36 or fewer items in a week, he is paid x dollars per item. If Bob produces more than 36 items in a week, he is paid x dollars per item for the first 36 items and 1.5 times that amount for each additional item. How many items did Bob produce last week?

  a) Last week Bob was paid a total of $480 for the items that he produced last week.

  b) This week Bob produced 2 items more than last week and was paid a total of $510 for the items that he produced this week.

第一题是不会做。 第二题我觉得是C， 因为我做出来这周Bob做了34个item,上周做了32个，价格为15元

prep的答案是第一题为B， 第二题为E

1.  20% old men +10% old women > 10% (old men + old women)

2.  x could be $15 or $10

thx

第一题阅读没有过关。。。

 Are at least 10 percent of the people（ in Country X who are 65 years old or older） employed。。。读成这种破句了。。。

sigh.....