Probability is equal to number of ways it can happen over number of total outcomes.
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.