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10 questions from this quiz
When sample space is very large
Total arrangements of event E
10,00010,00010,000
5,0405,0405,040
P(B)=1−P(not B)P(B) = 1 - P(\text{not B})P(B)=1−P(not B)
0.34390.34390.3439
202020
0.0250.0250.025
Same number of choices each time
Calculating 'none' is simpler
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