A card drawing simulation with 100 trials
The average number of cards required to
find 1 copy of
the target card is 43.9.
Cards Drawn 
Games 
Sum 
1  5 
10 
10 
6  10 
6 
16 
11  15 
3 
19 
16  20 
7 
26 
21  25 
6 
32 
26  30 
6 
38 
31  35 
6 
44 
36  40 
5 
49 
41  45 
2 
51 
46  50 
8 
59 
51  55 
4 
63 
56  60 
5 
68 
61  65 
5 
73 
66  70 
5 
78 
71  75 
4 
82 
76  80 
3 
85 
81  85 
5 
90 
86  90 
10 
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