Quantitative Aptitude :: Permutation and Combination - Discussion

Show Explanation

Please attempt the question to view the Explanation !!!

Explanation:
Let the number be _ _ _ _

Left digit can be any of the (1,2,4,5,7,8,9) --> 7 ways
Other digits can be (0,1,2,4,5,7,8,9) --> 8 ways

So the total ways = 7*8*8*8 = 3584 or 3584 numbers without any 3 or 6.