Find probability of a person keeping in touch with parents

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Reference no: EM13119159

Probability of a person keeping in touch with his or her parents

Please show the formula, and the steps in working the formula, to solve problems.

In a poll conducted in 2007, 2000 adults ages 18 yr and older were asked how frequently they are in touch with their parents by phone. The results of the poll are as follows:

Answer Respondents (%)
Monthly 11
Weekly 47
Daily 32
Do not know 2
Less 8

If a person who participated in the poll is selected at random, what is the probability that the person said he or she kept in touch with his or her parents

a. Once a week?
b. At least once a week?

Reference no: EM13119159

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