Question: 4.Two thousand randomly selected adults were asked whether or not they have ever shopped on the Internet. The following table gives a two-way classification of

4.Two thousand randomly selected adults were asked whether or not they have ever shopped on the Internet. The following table gives a two-way classification of the responses.

Have Shopped Have Never Shopped

Male 500 700

Female 300 500

a)If one adult is selected at random from these 2000 adults, find the probability that this adult has never shopped on the Internet.

b)If one adult is selected at random from these 2000 adults, find the probability that this adult is a male.

c)If one adult is selected at random from these 2000 adults, find the probability that this adult has shopped on the Internet given that this adult is a female.

d)If one adult is selected at random from these 2000 adults, find the probability that this adult is a male given that this adult has never shopped on the Internet.

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