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Statistics · PROB

Conditional Probability — P(A|B) and Independence

A bar graph shows numbers as bars. Taller bar = bigger number.

StatisticsCommon Core VAR-4.EPROBVerified correct ✓

Worked examples

A bag contains 6 red, 7 blue balls. One ball is drawn without replacement. Given that the first ball drawn is red, what is the probability that the second ball drawn is blue?
Answer: 0.5833
A bag contains 7 green, 3 blue balls. One ball is drawn without replacement. Given that the first ball drawn is blue, what is the probability that the second ball drawn is also blue?
Answer: 0.2222

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