问题标题：
高中数学题,关于概率与统计的,急需答案!Arealestatecompanywith8employeesintheirnorthofficeand6intheirsouthofficeisplanningtolayoff7employees.Iftheydecidetolayoff4employeesfromthenorthofficeand3fro
问题描述：
高中数学题,关于概率与统计的,急需答案!
Arealestatecompanywith8employeesintheirnorthofficeand6intheirsouthofficeisplanningtolayoff7employees.Iftheydecidetolayoff4employeesfromthenorthofficeand3fromthesouthoffice,inhowmanywayscanthisbedone?
a)12waysb)48waysc)1400waysd)noneofthese
吕思义回答：
north:8中取4,
south6中取3,
用组合数,相乘,得1400
选C
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