Percentage practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
In an examination, 70% of the students passed Mathematics, 65% passed English and 55% passed both subjects. If 120 students failed in both subjects, find the total number of students.
एक परीक्षा में 70% विद्यार्थी गणित में, 65% अंग्रेजी में और 55% दोनों विषयों में उत्तीर्ण हुए।
यदि 120 विद्यार्थी दोनों विषयों में अनुत्तीर्ण हुए, तो कुल विद्यार्थियों की संख्या ज्ञात कीजिए।
Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answerसही उत्तर
C. 600 / 600
Explanationव्याख्या
Passed at least one subject = 70% + 65% − 55% = 80%.
Hence 20% failed both.
If 20% = 120, total students = 600.
कम-से-कम एक विषय में उत्तीर्ण = 70% + 65% − 55% = 80%।
अतः 20% दोनों में अनुत्तीर्ण हैं।
20% = 120, इसलिए कुल विद्यार्थी = 600।
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