b) How many permutations of the letters ABCDEFGHIJ contain: i) the string EF? ii) the strings BCA and FGH? iii) the strings BCA and ABFD?

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A: The correct answer is

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A: Given and required:

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A:

Q: M07.

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A: The code for the above given question is given below:

Q: tarting b

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A: The Answer is

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