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Mathematics 11 Online
OpenStudy (anonymous):

how many numbers greater than 23000 can be formed from the numbers 1,2,3,5,6 if repition is not allowed??

OpenStudy (anonymous):

case when the first digit is 2 and the second digit is not 1 + case when the first digit is either 3,5,6 = 1*3*3!+3*4!

OpenStudy (anonymous):

i dun get it :/

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