Solve the problem.If n(A) = 51, n(B) = 31, and n(A ? B) = 12, find n(A ? B).
A. 94
B. 82
C. 58
D. 70
Answer: D
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Find the area of the figure below. (The area of a rectangle is the product of its length and width. The area of a triangle is 
the product of its base and height.)
A. 3
sq. cm
B. 1
sq. cm
C. 2
sq. cm
D. 4
sq. cm
Write the ratio as a ratio of whole numbers using fractional notation. Write the fraction in simplest form.6.53 to 8.82
A. 
B. 
C. 
D. 
Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275 B. 0.22 C. 0.5667 D. 0.7083
Graph the ellipse and label the center.
+ 
= 1
A. C(2, 9)
B. C(-2, -9)
C. C(2, -9)
D. C(-2, 9)