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In an examination, 20% of the total number of students failed in English, 15% of the total number of students failed in Maths, and 5% of the total number of students failed in both. What is the percentage of students who passed in both the subjects?

In an examination, 20% of the total number of students failed in English, 15% of the total number of students failed in Maths, and 5% of the total number of students failed in both. What is the percentage of students who passed in both the subjects? Correct Answer 70%

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An examination consists of four sections viz. Maths, Science, English and Hindi. Certain number of students registered for the examination in which 12% did not appear for the examination and 8% of the total registered students were not able to clear any section. 12.5% of the appeared students cleared only Maths section, 25% of the appeared students cleared only Maths and Science section. 13% of the total registered students cleared only Maths, Science and English section. If the remaining students who appeared for the examination are 51 and cleared all the four sections, then what is the total number of students who appeared for the examination? (Note: No other case is possible other than given in the question) 
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In a mid-term exam of class 11, 42% students failed in Mathematics, 54% students failed in Physics and 48% students failed in Chemistry. Only 10% students failed in all the three subjects. 20% students failed in both Physics and Chemistry, 15% students failed in both Chemistry and Mathematics, and 18% students failed in both Physics and Mathematics. What is the percentage of those students who failed in two subjects only?
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Ten books are arranged in a row following a certain sequence. Among them 3 are History , 3 are Economics, 2 are Maths and 2 are English. From the left, there is an English book between a History and Maths book, a history book between a Maths and an English book, an Economics book between an English and a Maths Book. a Maths book between two Economics books and two Economics two Economics book between a Maths and a History book. Book of which subject is at the sixth position from the left?
In an examination, 41% of students failed in Economics, 35% of students failed in Geography and 39% of students failed in History, 5% of students failed in all the three subjects, 14% of students failed in Economics and Geography, 21% of students failed in Geography and History and 18% of students failed in History and Economics. Find the percentage of students who failed in only Economics.
In an examination, the number of students who passed and the number of students who failed were in the ratio 25 ∶ 4. If one more student had appeared and passed and the number of failed students was 3 less than earlier, the ratio of passed students to failed students would have become 22 ∶ 3. What is the difference between the number of students who, initially, passed the examination and the number of students who failed the examination?
In class of 105 students out of three subjects Maths, Physics, Chemistry each student studies at least one subject. In Maths 47, in Physics 50, and in Chemistry 52 students studies, 16 in Maths and Physics, 17 in Maths and Chemistry and 16 in Physics and Chemistry students both subjects. What will be the number of those students who study only two subjects?
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