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Discrete Mathematics. Thank You!!

3. Using the digits 1, 2, 3 and 5, how many 4 digit numbers can be formed if a) The first digit must be 1 and repetition of t
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3 a) 2nd dit anay slet 4 WoyA Snd d may seleet 4ways 4uays Ahus pari dota mawhen f 4 dins muwaer n 1st dint in 1 sdugit iSelu

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Discrete Mathematics. Thank You!! 3. Using the digits 1, 2, 3 and 5, how many 4...
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