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A medical research project examined the relationship between a subject's weight and recovery timefrom a surgical procedure, as shown in the table below.
Underweight
Normal weight
Overweight
Less than 3 days
6
15
3
3 to 7 days
30
95
20
Over 7 days
14
40
27
a. Use relative frequency to develop a joint probability table to show the marginal probabilities.
b. What is the a patient will recover in over 7 days?
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