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  1. (0.9 × 0.9 × 0.9 + 0.1 × 0.1 × 0.1) is equal to
    1. 0.73
    2. 0.82
    3. 0.91
    4. 1.00
Correct Option: A

(0.9)3 + (0.1)3
= 0.729 + 0.001 = 0.73


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