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Let A = {x : x is a multiple of 3} and B...

Let A = {x : x is a multiple of 3} and B = {x : x is a multiple of 5), then `A nn B` is given by

A

`[3,6,9,. . . }`

B

`{5,10,15,20, .. . }`

C

`{15,30,45,. . . }`

D

none of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-SETS-Exercise
  1. two finite sets have m and n elements . The total number of subs...

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  2. if X and Y are two sets , then X cap (Y cup X)'equals

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  3. Let A = {x : x is a multiple of 3} and B = {x : x is a multiple of 5),...

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  4. Given the sets A={1,2,3}, B={3,4}, C={4,5,6}, then find Auu(BnnC).

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  5. Let A and B be two non- empty subsets of a set X such that A is not a ...

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  6. Let U be the universal set for sets A and B such that n(A) =200 ...

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  7. Out of 800 boys in a school, 224 played cricket, 240 played hockey and...

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  8. From 50 students taking examinations in mathematics, physics and chemi...

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  9. Let Z be the set of all integers and A={(a,b):a^(2)+3b^(2)=28 ...

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  10. in a class of 35 students , 17 have taken Mathematics , 10 have ta...

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  11. if A={(x,y):y=(4)/(x),xne0}and B= {(x,y):x^(2)+y^(2)=8,x,yin R},t...

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  12. If A = {x : x is a multiple of 4} and B = {x : x is a multiple of 6}, ...

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  13. if A={(x,y):x^(2)+y^(2)=4,x,y in R } and B={(x,y): x^(2)+y^(2)= 9,x,...

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  14. if A={(x,y):x^(2)+y^(2)=4, x,y in R }and B={(x,y):Y=|x|, x , y in ...

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  15. If A ={ theta : 2cos^2 theta + sintheta <=2} , and B = {theta: pi/2<=t...

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  16. in rule method the null set is resresented by

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  17. If A and B are two given sets, then Ann(AnnB)^(@) is equal to :

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  18. Let n(U)=700, n(A)=200,n(B)=300 and n(AnnB)=100, then find n(A'nnB')

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  19. If A = {x : x is a multiple of 3} and, B ={x : x is a multiple of 5}, ...

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  20. For any three sets A1,A2, A3, let B1=A1, B2 = A2-A1 and B3 = A3-(A1uuA...

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