A card drawing simulation with 100 trials
The average number of cards required to
find 1 copy of
the target card is 47.8.
Cards Drawn 
Games 
Sum 
1  5 
3 
3 
6  10 
2 
5 
11  15 
7 
12 
16  20 
4 
16 
21  25 
6 
22 
26  30 
10 
32 
31  35 
5 
37 
36  40 
6 
43 
41  45 
3 
46 
46  50 
2 
48 
51  55 
10 
58 
56  60 
12 
70 
61  65 
2 
72 
66  70 
7 
79 
71  75 
3 
82 
76  80 
4 
86 
81  85 
7 
93 
86  90 
7 
100 


Examples
I have 8 Information Highways in my 90 card deck; when
should I expect to draw at least 1?
Decksize = 90, Target = 8, Search = 0, Desired = 1
I have 12 Raptors and 6 Muricia's Call in my 90 card
deck; when should I expect to draw at least 7?
Decksize = 90, Target = 12, Search = 6, Desired = 7
I have 2 Anthelios and 1 Fortschritt Library in my 90
card deck; when should I expect to draw at least 1?
Decksize = 90, Target = 2, Search = 1, Desired = 1
I have 5 vampires with Dominate in my 12 card crypt;
when should I expect to draw at least 1?
Decksize = 12, Target = 5, Search = 0, Desired = 1