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If X and Y are two sets such that X h...

If X and Y are two sets such that X has 40 elements, `X uuY` has 60 elements and `X nnY` has 10 elements, how many elements does Y have?

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RD SHARMA ENGLISH-SETS-All Questions
  1. A college warded 38 medals in football, 15 in basketball and 20 in ...

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  2. If A and B are two sets such that n(AuuB)=50 ,\ n(A)=20\ a n d\ n(B)=3...

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  3. If X and Y are two sets such that X has 40 elements, X uuY has 60 e...

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  4. In a school there are 20 teachers who teach mathematics or physics....

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  5. In a group of 70 people, 37 like coffee, 52 like tea and each perso...

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  6. Let A and B be two sets such tat : n(A)=20 ,\ n(AuuB)=42\ a n d\ n(Ann...

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  7. Let A and B be two sets such tat : n(A)=20 ,\ n(AuuB)=42\ a n d\ n(Ann...

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  8. Let A and B be two sets such tat : n(A)=20 ,\ n(AuuB)=42\ a n d\ n(Ann...

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  9. A survey shows that 76% of the Indians like oranges, whereas 62%like ...

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  10. In a group of 950 persons, 750 can speak Hindi and 460 can speak En...

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  11. In a group of 1000 people all of whom speak atleast one of Bengali or ...

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  12. In a survey of 100 persons it was sound that 28 read magazine A, 30 re...

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  13. In a group of 50 persons, 14 drink tea but not coffee and 30 drink tea...

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  14. In a survey of 100 students, how many of students studying the various...

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  15. Write the number of elements in the power set of null set.

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  16. Let A={x ; x in N ,\ x is a multiple of 3} and B={x : x in N\ a n d\...

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  17. If A and B two sets containing 3 and 6 elements respectively and if mi...

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  18. If A={x in C : x^2=1}\ a n d\ B={x in C : x^4=1} , then write A-B\ a...

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  19. Let A and B be two sets having 4 and 7 elements respectively. Then ...

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  20. If A={(x ,\ y): y=1/x ,\ 0!=x in R}a n d\ B={(x , y): y=-x ,\ x in R...

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