A) 9
B) 18
C) 10
D) None of these
Correct Answer: C
Solution :
In forming even numbers, the position on the right can be filled either 0 or 2. When 0 is filled, the remaining positions can be filled in \[3\ !\] ways and when 2 is filled, the position on the left can be filled in 2 ways (0 cannot be used) and the middle two positions in \[2\ !\] ways (0 can be used). Therefore the number of even numbers formed \[=3\ !+2(2\ !)=10\].You need to login to perform this action.
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