The number of elements in the Power set P(S) of the set S = [ [ Φ] , 1, [ 2, 3 ]] is
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | None of these |
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Option: C Explanation : Click on Discuss to view users comments. mahesh said: (1:49pm on Tuesday 23rd April 2013)
n to the power of 2 is the ansn is 3
Sakthivel said: (8:57am on Friday 19th May 2017)
If u want a set. It should have set bracket. Because in some exam they will ask twisted que.
sahil said: (6:12am on Thursday 1st February 2018)
though this is not the prresentation of set .lets consider above setdn we have its solution as:2 raise to power 3 (i.e the number of elements in given set) so its ans is 8
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If A and B are sets and A∪ B= A ∩ B, then
| A. | A = Φ |
| B. | B = Φ |
| C. | A = B |
| D. | none of these |
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Option: C Explanation : Click on Discuss to view users comments. |
Let S be an infinite set and S1, S2, S3, ..., Sn be sets such that S1 ∪S2 ∪S3∪ .......Sn = S then
| A. | atleast one of the sets Si is a finite set |
| B. | not more than one of the set Si can be inite |
| C. | atleast one of the sets Si is an ininite set |
| D. | none of these |
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Option: C Explanation : Click on Discuss to view users comments. Sakthivel said: (9:13am on Friday 19th May 2017)
Why can't we say that option a. Its also correct.
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If X and Y are two sets, then X ∩ (Y ∪ X) C equals
| A. | X |
| B. | Y |
| C. | Ø |
| D. | None of these |
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Option: C Explanation : Click on Discuss to view users comments. Usha Kiran said: (8:46pm on Monday 27th February 2017)
if X = {1,2,3} and Y = {4,5,6} then XUY = {1,2,3,4,5,6} and X intersection (XUY) ={1,2,3}therefore answer should be A.
Manzoor Ahmed said: (12:07am on Sunday 16th July 2017)
Should be option A, all the elements which are found in both X and Y U X are same as of X
Bijaya Sen Khadka said: (3:47am on Monday 12th February 2018)
(XUY) has C in its end which means complement. So the answer is not A. (XUY)C has nothing common with X so the answer is C.
Irshad said: (5:53pm on Monday 26th February 2018)
This law is called absorption law so option A
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