A poll of 100 senior citizens in a retirement community asked about the types of electronic communication they used. The table shows the joint and marginal frequencies from the poll results,
If you are given that one of the people polled uses text messaging, what is the probability that the
person is also using e-mail? Express your answer as a decimal. If necessary, round your answer to the
nearest hundredth.
Uses text messaging
Total
0.83
Uses e-mail
Yes No
Yes 0.17 0.66
No 0.11 0.06
Total 0.28 0.72
0.17
1
None of the other answers are correct
O 0.61
O 0.65
O 0.13
O 0.8