Experiment
Experimental Outcome (Possibilities)
Toss a Coin
Head, Tail
Select a part for inspection
Defective, Non-Defective
Conduct a Sales
Purchase, No Purchase
Roll a die
1, 2, 3, 4, 5, 6
Play a football game
Win, Lose, Tie
Example: PIZZA
The probability that a customer selects a pizza with mushrooms or pepperoni is 0.43 and
customer selects pizza only mushrooms is 0.32. If the probability that s/he selects only
pepperoni is 0.17, find the probability of customer selecting both items.
Example: WIC
The worldwide Insurance Company (WIC) found that 53% of the residents had homeowners’
insurance (H) with WIC. Of these clients 27% also had automobile insurance (A). If a resident
is selected at random, what is the probability that resident has both H and A?
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Probability – the chance that an uncertain event
will occur (always between 0 and 1)
Impossible Event – an event that has no chance
of occurring (probability = 0)
Certain Event – an event that is sure to occur
(probability = 1)