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 obtained.
a. Suppose one adult is selected at random from these 2000 adults. Find the following probabilities.
i. P(has never shopped on the Internet and is a male)
ii. P(has shopped on the Internet and is a female)
b. Mention what other joint probabilities you can calculate for this table and then find those. You may draw a tree diagram to find these probabilities.

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