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How many ways are there to arrange the letters ‘a’, ‘b’, ‘c’, ‘d’, and ‘e’ such...

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Advance Math

How many ways are there to arrange the letters ‘a’, ‘b’, ‘c’,‘d’, and ‘e’ such that ‘a’ is not immediately followed by ‘e’ (norepeats since it is an arrangement)? Justify your answer using theproduct rule, the sum rule, and/or the subtraction rule .

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We need to arrange the letters a b c d e such that a isnot immediately followed by e If we fix the letter a in first position then is is not followed byany letters so in rest of the four    See Answer
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