SOLUTION: So find the number of distinguishable five - letter permutations that can be formed from the letters in the word window using the following steps a) Find the number of distingui

Question 756855: So find the number of distinguishable five - letter permutations that can be formed from the letters in the word window using the following steps
a) Find the number of distinguishable five letter sequences containing exactly one w
b)Find the number of distinguishable five letter sequences containing exactly two w's
c) Add the results of steps a and b
I get a is 5 factorial but how do you do b???
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
So find the number of distinguishable five - letter permutations that can be formed from the letters in the word window using the following steps
a) Find the number of distinguishable five letter sequences containing exactly one w
Ans: 5! = 120
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b)Find the number of distinguishable five letter sequences containing exactly two w's
Patterns:
wwind
wwino
wwido
wwndo
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# of arrangements of each pattern: 5!/2! = 60
Total # of arrangements 4*60 = 240
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c) Add the results of steps a and b
Ans: 360
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Note: The answer to part "b" was provided by the
person who posted this problem. Thank You
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Cheers,
Stan H.
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