P(Event) = number
of favorable outcomes
number of total possible outcomes
A bag contains 7 red marbles, 9 blue marbles and 8 green marbles.
What is the probability of reaching into the bag (one time) and
pulling out a blue one?
A piggy bank contains 10 nickels, 22 dimes, 13 quarters and 5
half-dollars. If you shake the bank until a single coin drops
out, what is the probability that the coin is worth at least 10
cents?
From a standard deck of 52 playing cards a single card is drawn,
recorded and then put back in the deck. Find the probability
of each of the following events.
(a) P( a "face" card)
(b) P( a "4")
(c) P( a red "15")
