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Maths Puzzle
The number of permutations of letters a,b,c,d,e,f,g such that neither the pattern 'beg' nor 'acd' occurs is
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- 7!-5!-5!+3!=4806
- 11 years agoHelpfull: Yes(3) No(0)
- 7!-(4!+4!)=4992
- 11 years agoHelpfull: Yes(1) No(1)
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