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Kenneth Rosen Edition 6th Exercise 5.1 Question 37 (Page No. 346)

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For 1st element in m,we have n choices+ 1(for not taking any of n)---------------------(n+1)

For 2nd element in m,we have n choices+ 1(for not taking any of n).-------------------(n+1)

....

For m elements in m,jst multiply all                                               .-----------------------(n+1)^m

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