18 26 26 26 26 counting principle combination factorial perm

18. 26· 26· 26· 26
counting principle, combination, factorial, permutation.
19. 900 C 10
counting principle, combination, factorial, permutation.

20. 90!÷(90-10)! · 10!
counting principle, combination, factorial, permutation.

21. in a crowd of 90 people, how many ways can 10 digital music players be given away?
counting principle ,combination , factorial, permutation.
22. a computer randomly generates a four letter password. how many passwords are possible if letters maybe repeat it?
counting principle, combination ,factorial, permutation.
23. in a sweepstakes with 90 entries, the selected winners each receive one of ten big screen televisions. how many possible outcomes are there?
counting principle, combination ,factorial, permutation.

fill in the blank with the appropriate problem number 18 19 or 20 and then give the solution (you may use scientific, notation rounded to the nearest tenth if necessary).
24. problem 21 can be solved with the setup given in problem ____,and the solution to problem 21 is:
25. problem 22 can be solved with the setup given in problem ____,and the solution to problem 22 is:
26. problem 23 can be solved with the setup given in problem____, and the solution to problem 23 is:

Solution

Ans(18):

counting principle

same as problem 21

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Ans(19):

combination

because C is present

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Ans(20):

combination

that is just formula of combination

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Ans(21):

counting principle

sicne all 10 music players can be given to same person too so In a crowd of 90 people 10 music players can be given away in 90^10 ways

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