SSC CHSL Tier-1 practice question
Three groups of farmers reported per-acre income as — Group X: 25 farmers, average Rs 20; Group Y: 15 farmers, average Rs 40; Group Z: 10 farmers, average Rs 70. Find the combined average per-acre income of all three groups together.
From a SSC CHSL Tier-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 36 Rs
Total farmers = 25 + 15 + 10 = 50. Group-wise sums: 25 × 20 = 500, 15 × 40 = 600, 10 × 70 = 700. Combined sum = 500 + 600 + 700 = 1800. Combined average = 1800 ÷ 50 = 36 Rs.
हिंदी में प्रश्न
तीन किसान समूहों की प्रति एकड़ आय इस प्रकार है — समूह X: 25 किसान, औसत 20 रुपये; समूह Y: 15 किसान, औसत 40 रुपये; समूह Z: 10 किसान, औसत 70 रुपये। तीनों समूहों को मिलाकर संयुक्त औसत प्रति एकड़ आय ज्ञात कीजिए।
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सही उत्तर: (C) 36 रुपये
कुल किसानों = 25 + 15 + 10 = 50. समूह-वार योग: 25 × 20 = 500, 15 × 40 = 600, 10 × 70 = 700. संयुक्त योग = 500 + 600 + 700 = 1800. संयुक्त औसत = 1800 ÷ 50 = 36 रुपये.
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