Mutually exclusive and exhaustive events (AQA GCSE Statistics): Flashcards
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What are mutually exclusive events?
What are mutually exclusive events?
Events that cannot happen at the same time.
Example of mutually exclusive events with dice?
Example of mutually exclusive events with dice?
Rolling a 3 and a 5 cannot happen together.
How to write probability of rolling a 6?
How to write probability of rolling a 6?
P(6) = 1/6 for a standard dice.
What is the sum of probabilities for exhaustive events?
What is the sum of probabilities for exhaustive events?
They must add up to 1.
Formula for mutually exclusive events?
Formula for mutually exclusive events?
P(A or B) = P(A) + P(B).
Calculate P(red or yellow) if P(red)=0.4, P(yellow)=0.4?
Calculate P(red or yellow) if P(red)=0.4, P(yellow)=0.4?
P(red or yellow) = 0.4 + 0.4 - P(red and yellow)
What is the missing probability if P(Red)=0.1, P(Green)=0.25, P(Yellow)=0.3?
What is the missing probability if P(Red)=0.1, P(Green)=0.25, P(Yellow)=0.3?
P(Other) = 0.35 (total must equal 1).
Calculate P(green or yellow) if P(green)=0.25, P(yellow)=0.3?
Calculate P(green or yellow) if P(green)=0.25, P(yellow)=0.3?
P(green or yellow) = 0.25 + 0.3 = 0.55.
What is the complement rule in probability?
What is the complement rule in probability?
P(not A) = 1 - P(A).
Why can't you add probabilities of non-mutually exclusive events?
Why can't you add probabilities of non-mutually exclusive events?
They can occur together, so use different methods.