单选题
If 120% of a is equal to 80% of b, which of the following is equal to a + b?
(A) 1.5a
(B) 2a
(C) 2.5a
(D) 3a
(E) 5a
A
B
C
D
E
【正确答案】
C
【答案解析】
Since 120% of 80 = 80% of120,1et a = 80 and b = 120. Then a + b = 200, and 200 + 80 = 2.5.
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