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n(A)=20, n(B)=18 and n(A cap B)=5, then ...

n(A)=20, n(B)=18 and `n(A cap B)=5`, then `n(A cup B)` is

A

13

B

18

C

15

D

18

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE-SETS -SECTION-A(Objective Type Questions (One option is correct))
  1. If M={3,6,9,18,27} and N={1,3,9,27} then M cup N is

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  2. The pair of disjoint sets are

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  3. Let A be the sets of the letters in the world "RAIGARH" and B be the s...

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  4. If D={x:x is divisible by 2 and 3 and 0 lt x lt 20} and B={x:x is a mu...

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  5. The shaded area in given Venn diagram represent

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  6. Which of the following Venn diagram represent (A-B)?

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  7. For all sets A and B, A - (A nn B) is equal to "………"

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  8. Let A={x:x is a prime number less than 10} and B={x:x in N and 0 lt x ...

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  9. If X and Y are two stes than X cap (X cap Y) equals to

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  10. If X and Y are two subsets of the unitversal set U and X' denotes the ...

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  11. If M={x: x ge 7 and x in N} for universal set of natural number, then ...

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  12. For any two set A and B , A'-B' is equal to

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  13. For any two sets A and B, the value of [(A-B) cup B] is equal to

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  14. n(A)=20, n(B)=18 and n(A cap B)=5, then n(A cup B) is

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  15. n(A)=20, n(B)=18 and n(A cap B)=5, then n(A cup B) is

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  16. If n(U) = 50, n(A) = 20, n(AuuB) = 18 then n(B- A) is

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  17. If n(U) = 50, n(A) = 20, n(AuuB) = 18 then n(B- A) is

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  18. There are 280 members in a club, each have at least one beaverage. 100...

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  19. In a class of 60 students, 30 students like Mathematics, 25 like Scie...

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  20. In a class of 60 students, 30 students like Mathematics, 25 like Scie...

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