RRB NTPC · Question 85
If P = 0.3 × 0.3 + 0.03 × 0.03 - 0.6 × 0.03 and Q = 0.54, then \(\rm \frac{P}{Q}\) is equal to:
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Answer: (C) 0.135
Explanation
P = 0.3² + 0.03² − 2 × 0.3 × 0.03 = (0.3 − 0.03)² = 0.27² = 0.0729. P/Q = 0.0729/0.54 = 0.135.