In a test consisting of 150 questions carrying 1 mark each, Rishab answered 80% of the first 75 questions correctly. What percent of the other 75 questions does he need to answer correctly to score 60% overall?प्रत्येक के लिए 1 अंक वाले 150 प्रश्नों की एक परीक्षा में ऋषभ ने पहले 75 प्रश्नों में से 80% के सही उत्तर दिए। कुल मिलाकर 60% अंक प्राप्त करने के लिए, शेष 75 प्रश्नों में से कितने प्रतिशत के सही उत्तर देने होंगे?
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Correct answer: B. 40
Explanation
Correct in the first half = 80% of 75 = 60. To score 60% overall he needs 60% of 150 = 90 marks. Remaining required = 90 − 60 = 30 out of the other 75 questions, i.e. (30 ÷ 75) × 100 = 40%.पहले भाग में सही = 75 का 80% = 60। कुल 60% पाने के लिए आवश्यक अंक = 150 का 60% = 90। शेष आवश्यक = 90 − 60 = 30 प्रश्न, शेष 75 में से, अर्थात् (30 ÷ 75) × 100 = 40%।More Mathematical Reasoning and Aptitude questions
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