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答案：
D
Algebra Sim
Let A, B, and C be the amounts inherited, respectively and in dollars, of the oldest, middle, and youngest child. It is given that A = 7,000 + C and C = B − 9,000. Then A = 7,000 +
(B − 9,000) = B − 2,000. Determine the value of A + B + C, or equivalently, determine the value of (B − 2,000) + B + (B − 9,000) = 3B − 11,000.
1. Given that B = 27,000, it follows that 3B − 11,000 = 70,000; SUFFICIENT.
2. Given that B + C = 45,000, then using C = B − 9,000 it follows that B + (B − 9,000) = 45,000, which can be solved to obtain B = 27,000. Therefore,3B − 11,000 = 70,000; SUFFICIENT.
The correct answer is D;
each statement alone is sufficient.
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