Find the number of 4 digits formed with 1,2,3,4,5 in which 3 occurs at the unit place
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Answer:24 digits can be formed.
Step-by-step explanation:
4P3 * 3! = 24
as 3 is kept on unit place we are left will only 1245 i.e. 4 digits which are then permuted among themselves i.e. 3! .
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