In an examination 42% students failed in Mathematics and 52% failed in Science. If 17% failed in both the subjects, find the percentage of those who passed in both the subjects.किसी परीक्षा में 42% विद्यार्थी गणित में अनुत्तीर्ण हुए और 52% विज्ञान में अनुत्तीर्ण हुए। यदि 17% दोनों विषयों में अनुत्तीर्ण हुए, तो दोनों विषयों में उत्तीर्ण होने वाले विद्यार्थियों का प्रतिशत ज्ञात कीजिए।
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Correct answer: A. 23 %
Explanation
Failed in at least one subject = 42 + 52 − 17 = 77%. Therefore students who passed in both subjects = 100 − 77 = 23 %.कम से कम एक विषय में अनुत्तीर्ण = 42 + 52 − 17 = 77%. अतः दोनों विषयों में उत्तीर्ण विद्यार्थी = 100 − 77 = 23 %।More Mathematical Reasoning and Aptitude questions
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