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Question Number 192103 by Spillover last updated on 08/May/23

Answered by otchereabdullai@gmail.com last updated on 08/May/23

the most important thing to know is  we cant start the number with zero  since is a four digit mumber without  repetition  the first can be chosen in 5 ways,  the second can be chosen in 5 ways  the third can be chosen in 4 ways  the forth can be chosen in 3ways  so  number of ways =5×5×4×3                                       300ways

themostimportantthingtoknowiswecantstartthenumberwithzerosinceisafourdigitmumberwithoutrepetitionthefirstcanbechosenin5ways,thesecondcanbechosenin5waysthethirdcanbechosenin4waystheforthcanbechosenin3wayssonumberofways=5×5×4×3300ways

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