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Let x be the number of days per year that the level of air


Let x be the number of days per year that the level of air pollution exceeds the standard in a certain city.  The probability distribution of x is given by:

Find the probability that the standard is exceeded on at least one day.

x         0,           1,            2,             2,           3

p(x)      0.33,      0.38,      0.19,        0.06,      0.04

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Basic Statistics: Let x be the number of days per year that the level of air
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