How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so that the odd digits always occupy the odd places?

How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so

1.	How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so that the odd digits always occupy the odd places?
A.	18
B.	28
C.	6
D.	27
Answer» B. 28

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How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so that the odd digits always occupy the odd places?

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