Due to the simplicity of the given number, it is a Combination problem.I was given a set of number "0000011"
and asked how many different arrangements I can make with this set of number.
We will have a 7-digit number: ._ _ _ _ _ _ _
Select 2 of the position in which to place the 1's.
(The 0's will go in the remaining positions.)
The answer is: . arrangements.