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SSC MTS 2018 · PYQ · Simplification · medium

What is the value of: (9 ÷ 30)² × 2.4 + 0.3 of 12 × (1 − 0.3)² + 9 × (0.3)² = ?

  1. A.2.79✓ Correct
  2. B.3.69
  3. C.3.43
  4. D.2.17

Explanation

(0.3)² × 2.4 + 3.6 × (0.7)² + 9 × 0.09 = 0.09×2.4 + 3.6×0.49 + 0.81 = 0.216 + 1.764 + 0.81 = 2.79. Wait: 0.09×2.4=0.216, but book says 0.09×2.4=... let me recalc: 1.98+0.81=2.79.
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