1. Three persons enter into a car , where there are 5 seats . in how many ways can they take up their seats ?
Ans :- the first person As a choice of 5 seats and can sit in anyone of does 5 seats . there are 5 ways are occupying the 1st seat . the second person has a choice of 4 seats . similarly the 3rd person has a choice of 3 seats. hence the required no. Of ways in which all 3 persons can see it
5*4*3 = 60
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