SAT数学一道排列组合题求解答The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job.The company has 4 experienced plumbers and 4 trainees.If a team consists of 1 experienced plumber and 2 trainees,how many differe
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SAT数学一道排列组合题求解答The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job.The company has 4 experienced plumbers and 4 trainees.If a team consists of 1 experienced plumber and 2 trainees,how many differe
SAT数学一道排列组合题求解答
The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job.The company has 4 experienced plumbers and 4 trainees.If a team consists of 1 experienced plumber and 2 trainees,how many different such teams are possible?
不知道怎么算出来的…
SAT数学一道排列组合题求解答The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job.The company has 4 experienced plumbers and 4 trainees.If a team consists of 1 experienced plumber and 2 trainees,how many differe
4 experienced plumbers中选1 experienced plumber,有4种可能;
4 trainees中选2 trainees,共6种可能,
4*6=24