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Information about Intreasting question on set theory

Published on February 27, 2014

Author: ManishJaiswal12

Source: slideshare.net

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20. Defect in finishing 30, in hardness 23 and in dimension 50. The inspector was fined, why? 5.In an Engineering college 80 students get chance for Computer Science, 75 for Information Technology, 72 for Electronics. If 60 students get chance in 1st and 2nd, 50 in 2nd and 3rd , 40 in 1st and 3rd and 30 get chance in all three branches, how many seats are there in the Engineering College?[The college has only three disciplines.] 6.A company studies the product preferences of 300 consumers. It was found that 226 liked product A, 51 liked product B, 54 liked product C;21 liked products A and B, 54 liked products A and C, 39 liked products B and C and 9 liked all the three products. Prove that, the study results are not correct. [Assume that each consumer likes at least one of the three products.] 7.The production manager of Sen, Sarkar and lahiri company examined 100 items produced by the workers and furnished the following report to his boss: Defect in measurement 50, defect in colouring 30, defect in quality 23, defect in quality and colouring 10, defect in measurement and colouring 8, defect in measurement and quality 20 and 5 are defective in all respect. The manager was penalised for the report. Using appropriate result of set theory explain the reason for the penal measure.

8. In a city three daily newspapers are published. 40% of the people in that city read A; 53% read B; 68% read C; 32% read A and B; 26% read B and C; 30% read A and C; 17% do not read any of these newspapers. Find the percentage of people who read all the three newspapers. 9. At a certain conference of 100 people, there are 29 Indian women and 23 Indian men. Of these Indian people 4 are doctors and 24 are either men or doctors. There are no foreign doctors. How many foreigners are attending the conference? How many women doctors are there in the conference? 10. Each of the students of a certain class of a school twice visited cinema hall during a month. 16 saw the film A, 27 saw the film B and 29 saw the film C respectively. Find out the number of students in the class. How many of them saw the film A and B? [Assume that nobody saw a film twice.] 11. In a city three daily newspapers X, Y, Z are published; 65% of the citizens read X, 54% read Y, 45% read Z; 38% read X and Y; 32% read Y and Z; 28% read X and Z; 12% do not read any one of these three papers. If the total number of people in the city be 10,00,000 find the number of citizens who read all the three newspapers. [You may use a Venn diagram or a standard formula for the enumeration of elements of sets.] 12. Out of 1,000 students in a college, 540 played football, 465 played cricket and 370 played volleyball; of the total 325 played both football and cricket, 260 played football and volleyball,

235 played cricket and volleyball, 125 played all the three games. How man y students (i) did not play any game (ii)played only one game and (iii) played just two games?

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