How many combinations can be formed ou...

How many combinations can be formed out of 8 counters marked 1,2,3,4,5,6,7,9,8 taking them 4 at a time , there being atleast one odd one even counter in each combination ?

A

34

B

72

C

136

D

68

Text Solution

Verified by Experts

The correct Answer is:

D

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