Subscribers to a local newspaper were asked whether they regularly, occasionally, or never read the business section and also whether they had traded common stocks (or shares in a mutual fund) over the last year. The table shown here indicates the proportions of subscribers in six joint classifications.

a. What is the probability that a randomly chosen subscriber never reads the business section?
b. What is the probability that a randomly chosen subscriber has traded stocks over the last year?
c. What is the probability that a subscriber who never reads the business section has traded stocks over the last year?
d. What is the probability that a subscriber who traded stocks over the last year never reads the business section?
e. What is the probability that a subscriber who does not regularly read the business section traded stocks over the last year?

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Read Business Section Traded Stocks Yes No Regularly Occasionally Never 0.18 0.16 0.10 0.31 0.04 0.21 0