Exams › SSC CGL (Prelims) › General

Evaluate: (0.7^3 + 0.2^3 - 0.9^3) divided by (3 x 0.7 x 0.2 x (-0.9)).

1. 1
2. -1
3. 0
4. 2

Correct answer: 1

Solution

Let a = 0.7, b = 0.2, c = -0.9. Their sum is 0, so a^3 + b^3 + c^3 = 3abc. The expression therefore equals 3abc divided by 3abc, which is 1.

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