How many different 9-0 letter code words can be made using the symbols %, %, %, %, &, &, &, +, +?
1 Answer
Jul 9, 2017
1260
Explanation:
There are 4 percent signs, 3 ampersands, and 2 plus signs.
If each symbol were different, we'd be able to make
However, we have to take out the internal ordering of each repeated symbol (this will get rid of duplicates). There are