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A group of 123 workers went to a canteen...

A group of 123 workers went to a canteen for cold drinks, ice-cream and tea, 42 workers took ice-cream, 36 tea and 30 cold drinks. 15 workers purchased ice-cream and tea, 10 ice-cream and cold drinks, and 4 cold drinks and tea but not ice-cream, 11 took ice-cream and tea but not cold drinks. Determine how many workers did not purchase anything?

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ML KHANNA-CONCEPTS OF SET THEORY -Problem Set (1)
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  5. In a survey of 200 students of a school, it was found that 120 study...

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  6. A survey shows that 63% of the Indians like cheese, whereas 76% like a...

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  7. In a pollution study of 1500 Indian rivers the following data were rep...

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  8. A group of 123 workers went to a canteen for cold drinks, ice-cream an...

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  9. A survey of 500 television watchers produced the following information...

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  10. In a town of 10,000 families it was found that 40% families buy newspa...

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  11. In a town of 10,000 families it was found that 40% families buy newspa...

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  12. In a town of 10,000 families it was found that 40% families buy newspa...

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  13. The report of one survey of 100 students stated that the numbers study...

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  14. A survey conducted on 600 students of B.A. part I classes of a college...

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  15. Let A, B, C be subsets of the universal set U. If n(U)=692,n(B)=230,</...

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  16. If the set A contains 5 elements, then the number of elements in the p...

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  17. Given A={x:x is a root of x^(2)-1=0},B={x:x is a root of x^(2)-2x+1=0}...

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  18. Let S = {1,2,3,4}. The total number of unordered pairs of disjoint sub...

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  19. 25 people for programme A, 50 people for programme B, 10 people for bo...

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  20. Let X""=""{1,""2,""3,""4,""5} . The number of different ordered pairs ...

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