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The on line publication Cyber Stats by Mediamark Research Inc reports

The on-line publication Cyber Stats by Mediamark Research, Inc. reports Internet access and usage. The following is a percentage distribution of household income for households with home Internet access only.

Suppose that a household with home Internet access only is selected at random. Let A denote the event the household has an income under $50,000, B denote the event the household has an income between $50,000 and $75,000, and so on (see the third column of the table). Apply the special addition rule to find the probability that the household obtained has an income

a. Under $75,000.

b. $50,000 or above.

c. Between $50,000 and $149,999, inclusive.

d. Interpret each of your answers in parts (a)-(c) in terms of percentages.

Suppose that a household with home Internet access only is selected at random. Let A denote the event the household has an income under $50,000, B denote the event the household has an income between $50,000 and $75,000, and so on (see the third column of the table). Apply the special addition rule to find the probability that the household obtained has an income

a. Under $75,000.

b. $50,000 or above.

c. Between $50,000 and $149,999, inclusive.

d. Interpret each of your answers in parts (a)-(c) in terms of percentages.

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