答案：D
If 75 percent of a class answered the first question on a certain test correctly, 55 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly?
(A) 10%
(B) 20%
(C) 30%
(D) 50%
(E) 65%
答案：D
A store currently charges the same price for each towel that it sells. Ifthe current price of each towel were to be increased by $1, 10 fewer of the towels could be boughtfor $120, excluding sales tax. What is the current price of each towel?
(A) $ 1
(B) $ 2
(C) $ 3
(D) $ 4
(E) $12
答案：C
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