Question

How many 5- digits numbers can be
formed with the digits 3, 4, 5, 6, 5, 4, 3
so that the even digits always occupy
the even place?​

Answer 1

3,4,5,6,4,3

6,4,5,4,3,3

5,4,3,4,3,6

4,5,6,3,3,4

3,5,6,4,4,3

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Answer 2

34563

54363

34365

36345

56345

34345

54343