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    Question

    src="https://www.ixambee.com/questionimage/Chapter/1648726622-s48.png" alt="" />
    A 0.28 Correct Answer Incorrect Answer
    B 0.5 Correct Answer Incorrect Answer
    C 0.01 Correct Answer Incorrect Answer
    D 0.1 Correct Answer Incorrect Answer

    Solution

    Let a = 0.8 and b = 0.6 = (0.8 + 0.6)(0.8 – 0.6) / 1.4 × (0.8 + 0.6) / (0.8 + 0.6) = 0.2 × 1.4 = 0.28

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