1a) How many five digit number can be written with the digits 1,2,3,4 if there is...

1a) How many five digit number can be written with the digits 1,2,3,4 if there is an even number of twos?

1b) How many five digit number can be written with the digits 1,2,3,4 if two can be used either 4 times, or none?

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Expert Solution

orchestra answered 1 year ago

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