What is P(took a vitamin | did not get the flu)?

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(took a vitamin | did not get the flu)?

A. 2/9

B. 7/9

C. 5/12

D. 7/12

Answer 1

60 people took the vitamin 35 did not get the flu so

35/60= 7/12