SSC CGL Tier-1 previous year question
In an examination, 72% of the students passed in English and 68% passed in Mathematics, while 20% of the students failed in both the subjects. If 300 students appeared in the exam, how many students passed in both the subjects?
Asked in SSC CGL Tier-1: 2024 Sep 10 Shift 3 () · Quantitative Aptitude
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Correct answer: (A) 180
Percentage passing in at least one subject = 100% - 20% (failed in both) = 80%. Using the formula: Pass(both) = Pass(English) + Pass(Maths) - Pass(at least one) = 72 + 68 - 80 = 60%. Number of students = 60% of 300 = 180.
हिंदी में प्रश्न
एक परीक्षा में 72% छात्र अंग्रेजी में उत्तीर्ण हुए और 68% छात्र गणित में उत्तीर्ण हुए, जबकि 20% छात्र दोनों विषयों में अनुत्तीर्ण रहे। यदि परीक्षा में 300 छात्र बैठे थे, तो कितने छात्र दोनों विषयों में उत्तीर्ण हुए?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 180
कम से कम एक विषय में उत्तीर्ण प्रतिशत = 100% - 20% (दोनों में अनुत्तीर्ण) = 80%। सूत्र: दोनों में उत्तीर्ण = अंग्रेजी में उत्तीर्ण + गणित में उत्तीर्ण - कम से कम एक में उत्तीर्ण = 72 + 68 - 80 = 60%। छात्रों की संख्या = 300 का 60% = 180।
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