Question

How many 4 digit
even
number can be
formed
using
digits 0 , 1 ,2,3,4,5,6

Answer 1

Answer:

My attempt to solve this problem is:

First digit cannot be zero, so the number of choices only 6(1,2,3,4,5,6)

The last digit can be pick from 0,2,4,6, so the number of choices only 4

Second digit can be only pick from the rest, so the number of choices only 5

Third digit can be only pick from the rest, so the number of choices only 4

The total number of choices is 6⋅4⋅5⋅4=480

So, is my solution true? Or I miss something? Thanks