Answer:
9
Explanation:
This can be represented by a "T Chart":
Heads | Tails
1------------- 9
2------------ 8
3------------ 7
4------------ 6
5------------ 5
6------------ 4
7------------ 3
8------------ 2
9------------ 1
Hope this helps! :)
I think that it could be 20 because you could have 10 different ones with heads and 10 different combintaions with tails.
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