Statistics
posted by crystal .
A jar contains 12 marbles, 5 of which are blue and 7 of which are red. If 4 marbles are
chosen at random and without replacement, what is the probability of selecting 3 blue ones and 1 red
one?

A delivery truck must make stops in eight different cities, designated by the first letter in
the name of the city: A, B, C, D, E, F, G, and H. If the order in which the truck visits the eight locations
is chosen randomly, what is the probability that it will visit them in alphabetical order? 
First blue = 5/12
Second blue = 4/11
Third blue = 3/10
Red = 7/9
The probability that all/both events occur is found by multiplying the probabilities of the individual events.