Answers

2014-11-13T11:27:59+08:00
Probability is equal to number of ways it can happen over number of total outcomes.

or simply

P(n) = (n1 + n2 + n3 ...)/nTotal

in your question n1 = 6(4 Alabama + 2 Minnesota [since you used the word or that represents addition || and for multiplication])

nTotal is equal to 7(4 Alabama + 1 New York + 2 Minnesota)

Now let's compute

P(6) = 6/7

P(6) = ~0.86 or ~86%

Therefore Peter has ~86% or picking up an Alabama or Minnesota state quarter.
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