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BENEFITS AND INCENTIVES SURVEY RESULTS FOR 600 COMPANIES
Note: Each shaded cell is the intersection of a benefit column and an incentive row and contains the number of companies (out of the 600 surveyed) that offer both that benefit and that incentive. For example, 195 of the companies surveyed offer both a disability-insurance benefit and a profit-sharing incentive.
A certain benefits and incentives package consists of 2 benefits to be chosen from the benefits offered by more than 1/2 of all the companies surveyed and 1 incentive to be chosen from the incentives offered by more than 1/3 of all the companies surveyed. How many suck packages are possible?
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当前版本由 必到330 更新于2021-03-08 10:39:57 感谢由 必到330 对此题目的解答所做出的贡献。
题干解读
题目的意思是：一个特定的benefit和incentive方案包括2项benefit和一项incentive，benefit从提供该benefit的公司数量超过被调查公司的1/2的这些benefit中选择，1项incentive从提供该incentive的公司数量超过被调查公司的1/3的这些incentive中选择。有多少种可能情况？
选项分析
要找出被选超过 1/2 的 benefits 和被选超过 1/3 的 incentive
答案解读
符合条件的benefit 4个 incentive2个
C(4,2)*C(2,1)=12种
当前版本由 351152rkspp 更新于2021-02-09 17:25:53 感谢由 351152rkspp 对此题目的解答所做出的贡献。
解题关键为看懂所给数据表. 行代表提供每种福利的公司数，列代表激励，其交叉格即为同时提供这两种福利和激励的公司数。
解析：
即要找出被选超过 1/2 的 benefits 和被选超过 1/3 的 incentive.
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