If 0 < a < b and a^2 + b^2 = 50, ab = 7, what is b − a?
A3
B4
C5
D6
E8
Answer & Solution
Correct answer: B. 4
1. Identify what is being asked: this is a **Algebra** question.
2. Apply the standard approach for this question type to evaluate each option.
3. The correct answer is **B. 4** — it satisfies the conditions of the stem.
_Source: GMAC Official 12 Sample Questions (mba.com)_
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