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The number of proper subsets of {1,2,3} ...

The number of proper subsets of {1,2,3} is

A

8

B

7

C

6

D

5

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The correct Answer is:
B
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NEW JOYTHI PUBLICATION-SETS-EXERCISE
  1. If A, B, C are three sets such that AcupB=AcupC and AcapB=AcapC, then

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  2. Sets A and B have 3 and 6 elements respectively. What is the minimum n...

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  3. The number of proper subsets of {1,2,3} is

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  4. Two finite sets have m and n elements. The total number of subsets of ...

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  5. If A, B and C are non empty sets, then (A-B)cup(B-A) equals

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  6. A={1,2,3}, B={3,4}, C={4,5,6} then Acup(BcapC) is

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  7. In a class of 100 students, 55 have passed in mathematics and 67 have ...

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

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  9. In a college of 300 students, every student reads 5 newspapers and eve...

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  10. If A and B are two given sets then Acap (A capB)^(c) is equal to

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  11. Let n(U)=700, n(A)=200, n(B)=300 and n(AcapB)=100, then n(A^(c)capB^(c...

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  12. In Rule Method the null set is represented by

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  13. If A and B are not disjoint sets then n(AcupB) is equal to

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  14. Let A and B be two sets such that n(A)=0.16, n(B)=0.14, n(AcupB)=0.25 ...

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  15. In a city 20% of the population travels by car, 50% travels by bus and...

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  16. Given n(U)=20, n(A)=12, n(B)=10, n(AcapB)=4 where U is the universal s...

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  17. If A={x:f(x)=0} and B={x:g(x)=0} then AcapB will be

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

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  19. If A={phi,{phi}}, then the power set of A is

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  20. If a set A has n elements, then the total number of subset of A or the...

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