扑克中的概率和文氏图 文氏图

P(Jack) = 4/52 = 1/13

P(♥) = 13/52 = 1/4

P(J and ♥) = 1/52

p(J or ♥) = (4+13-1)/52 = 16/52 = 4/13

文氏图

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''''
# of Jacks
/
/
+---------/--------------------------+
| / 52 |
| /--/-- |
| | 4 | |
| | /----------- |
| ---|./ | |
| ,'` 13 | |
| _-` | | |
| .' ----------/ |
,-` |
# of J -` | |
and ♥ | |
+-----------------------------------+

# of ♥
''''