What was the question for this implicit rationale, and corresponding answer?
? = 285 + 1895 – 655 – 645 or, ? = 880
 The answer: (C)
The question: What approximate value should come in place of question mark (?) in the following equation
287.532 + 1894.029 – 657.48 = 643.095 + ?
Options:
(A) 870
(B) 790
(C) 880
(D) 770
(E) 890