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10 cards from this deck
One event has no effect on probability of the other
P(A∣B)=P(A)P(A|B) = P(A)P(A∣B)=P(A)
P(B∣A)=P(B)P(B|A) = P(B)P(B∣A)=P(B)
P(A∩B)=P(A)×P(B)P(A \cap B) = P(A) \times P(B)P(A∩B)=P(A)×P(B)
Only when events are independent
Both a test for independence and a calculation tool
14\frac{1}{4}41
Use complement rule: 1−P(none)1 - P(\text{none})1−P(none)
Neither defective
Yes, both are equivalent ways to express independence
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