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In how many ways can three jobs I, II an...

In how many ways can three jobs I, II and III be assigned to three persons A, B and C if one person is assigned only one job and all are capable of doing each job?

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The correct Answer is:
6
A can be assigned any of the three jobs. So, there are 3 ways of assigning a job to A. B can now be assigned any of the two remaining jobs in 2 ways and C can now be assigned the job in 1 way.
So, the required number of ways `=(3xx2xx1)=6.`
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