A card drawing simulation with 100 trials
The average number of cards required to
find 1 copy of
the target card is 42.7.
Cards Drawn 
Games 
Sum 
1  5 
7 
7 
6  10 
5 
12 
11  15 
9 
21 
16  20 
8 
29 
21  25 
5 
34 
26  30 
5 
39 
31  35 
4 
43 
36  40 
4 
47 
41  45 
6 
53 
46  50 
4 
57 
51  55 
10 
67 
56  60 
6 
73 
61  65 
6 
79 
66  70 
1 
80 
71  75 
4 
84 
76  80 
6 
90 
81  85 
6 
96 
86  90 
4 
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