Im not sure how to answer this....

Question

The table below shows one doctor's patients who got the flu and whether or not they took a vitamin each day.

Got the flu	Did not get the flu	Totals
Took Vitamin	25	35	60
Did not take vitamin	30	10	40
Totals	55	45	100

 

What is P(got the flu | took vitamin)?

a. 5/12

b. 7/12

c. 5/11

d. 1/4

Answer 1

The column headers are shifted left. You are to determine the Probability that someone got the flu given that they took the vitamin. You need to take the number of people who go the flu and took the vitamin and divide by the total number of people who took the vitamin: 25/60 = 5/12

Please consider a tutor. Take care.