- #1
Government$
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- 1
Homework Statement
Let X be a set containing all four digit numbers made up of {1,2,3}, where every number contains every digit at lease once. Number of all subsets is:
The Attempt at a Solution
So firs i have to find number of elements in the set:
3!*3 + 3*12 = 54
Now what they mean by subsets? And did i calculated number of elements correctly?