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Suppose A1,A2….. A(30) are thirty sets e...

Suppose `A_1,A_2….. A_(30)` are thirty sets each having 5 elements and `B_1B_2…..B_n` are n sets each having 3 elements ,Let `overset(30)underset(i=1)bigcupA_1=overset(n)underset(j=1)bigcupB_j=s`
and each element of S belongs to exactly 10 of the `A_1` and exactly 9 of the value of n.

A

15

B

3

C

45

D

35

Text Solution

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The correct Answer is:
c
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MODERN PUBLICATION-SETS -OBJECTIVE TYPE QUESTIONS (A )(MULTIPLE CHOICE QUESTIONS)
  1. Suppose A1,A2….. A(30) are thirty sets each having 5 elements and B1B2...

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  2. Two finite sets have m and n elements. The number of subsets of the...

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  3. In a class of 65 students , 30 students play cricket and 20 students p...

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  4. If X={8^(n)-7n-1|n inN}and y= {49n-49|n in N}. Then

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  5. If A and B are any two sets, then what is Ann(AuuB) equal to?

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  6. Let S={x|x is a positive multiple of 3 less than 100}, P= {x|x is a p...

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  7. If X and Y are two sets and X' denotes the complement of X then Xcap(X...

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  8. What is Set ?? Representation of set and Different type of sets

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  9. If X= {1,3,5},Y={1,2,3,}, then XcapY is :

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  10. The set A= {x:x is an integer and -3lexlt2} is equal to :

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  11. Two sets A and B are not disjoint if :

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  12. The number of proper subsets of the set : A= {1,2,3,4,5} is :

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  13. A ={0} is a/an

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  14. If A = {2,3,4,5},B= {3,4,6,7} , then AuuB is :

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  15. Match each of the set on the left in the Roaster form with the same se...

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  16. Th set of girls in a boys school is :

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  17. The correct match of the following is : {:("Column -I",,"Column -II...

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  18. If X ={1,,3,5} , Y = {1,2,3} , then XuuY is :

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  19. If A , B, C are any three sets , then the correct match of the follow...

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  20. If A and B are any two sets and U , the universal set , then correct m...

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