Homework Help: Statistics

Posted by crystal on Wednesday, May 9, 2012 at 10:25am.

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?

Statistics - crystal, Wednesday, May 9, 2012 at 10:26am
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?
Statistics (first Q) - PsyDAG, Wednesday, May 9, 2012 at 12:06pm
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.

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