AS/A2 Stats 2 Stats 3

S1 Topic 3: Probability
Conditional probability
The probability that event A has occurred given that event B has already occured is denoted by: P(A|B)

A card has been selected at random from a pack. What is the probability that a diamond was selected given that the card was an Ace? Let A be the event "getting a diamond" and B the event "getting an Ace".

A card has been selected at random from a pack. What is the probability that a Queen was selected given that the card was a spade? Let A be the event "getting a Queen" and B the event "getting a Spade".

A dice has been thrown. What is the probability that the score was a 6 given that the score was greater than 1? Let A be the event "the score is 6" and B the event "the score is greater then 1".

A dice has been thrown. What is the probability that the score was even given that the score was less than 6? Let A be the event "the score is even" and B the event "the score is less then 6".

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