There are 10 differente figures (A,B,C,D,E,F,G,H,I,J), all equally probable to get.
We bought 25 pack which each contains only 1 figure
What is the porbability if we bought 25 packs we got all the differente figures, we found all the figures?
I figured that the total numbers of outcomes will be based on repetitive combination so (25-1+10 10) but i don't know how i should calculate the numbers of possible good outcomes