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If A and B are subsets of the universal set S such that `n(S)=100,n(A')=85,n(B')=80 and n(AcapB)'=95,` then: `n(A cup B)=`

A

15

B

5

C

20

D

30

Text Solution

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The correct Answer is:
D
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MARVEL PUBLICATION-SETS, RELATIONS AND FUNCTIONS-MCQs
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  2. If A and B are subsets of the universal set X, where n(X)=50,n(A)=35,n...

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  3. If A and B are subsets of the universal set S such that n(S)=100,n(A')...

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  5. In a class of 100 students, 55 students have passed in Mathematics and...

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  6. Q. In a college of 300 students, every student reads 5 newspaper and ...

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  7. If f is linear function such that f(2)=6 and f(3)=4, then: f(x)=

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  8. If f(x)=ax+5 and f(-1)=4, then: a=

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  9. If f(x)=3x+b and f(1)=8 then: b=

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  10. If f(x)=ax+b, where f(0)=3 and f(1)=5, then: (a,b)-=

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  11. If f(x) is a quadratic function such that f(0)=3,f(1)=6 and f(2)=11, t...

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  12. If f(x)=ax^2+bx+2, where f(-1)=7 and f(1)=5, then: f(a,b)-=

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  13. If f(x)=ax^2-3x+c where f(2)=3 and f(3) =10, then: (a,c)-=

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  14. if f(x)=ax^2+bx+c, where f(0)=4,f(1)=3 and f(-1)=9, then: (a,b,c)-=

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  15. If f(x)=x^2+2x+1, then: f(x-1)-=

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  16. If f(x)=(x-1)/(x+1) then f(2x) is equal to

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  17. If f(x)=log((1+x)/(1-x)), then: f((a+b)/(1+ab))=

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  18. If f(x-1)=f(x+1), where f(x)=x^2-2x+3, then: x=

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  19. If f(x-1)=f(x+2) , where f(x)=1+x-x^2 then: x=

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  20. If f(x-1)=x^(2), then find f(x+1)

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