Solve the problem.Among a group of 58 investors, 20 owned shares of Stock A, 25 owned shares of Stock B, 26 owned shares of Stock C, 10 owned shares of both Stock A and Stock B, 9 owned shares of Stock A and Stock C, 12 owned shares of Stock B and Stock C, and 6 owned shares of all three. How many investors did not have shares in any of the three? How many owned shares of either Stock A or Stock C but not Stock B?
A. 12; 21
B. 12; 18
C. 18; 18
D. 12; 24
Answer: A
Mathematics
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