1 votes 1 votes If we are given a set for ex.S={1,2,.....25} and now if we want to find subsets T ⊆ S of size 5 than it is 25C5 or they are 2^ 25C5. Set Theory & Algebra discrete-mathematics + – shivangi5 asked Oct 4, 2017 shivangi5 282 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply akash.dinkar12 commented Oct 4, 2017 reply Follow Share Eg: A = ( 1 , 2 , 3 ) P(A) = ( Φ , { 1 } , { 2 } , { 3 } , { 1 , 2 }, { 2 , 3 } ,{ 1 , 3 } , { 1 , 2 , 3 } ) subset of size 0: Φ = C(3,0) subset of size 1 : { 1 } , { 2 } , { 3 } = C(3,1) subset of size 2 : { 1 , 2 }, { 2 , 3 } ,{ 1 , 3 } =C(3,2) subset of size 3 : { 1 , 2 , 3 } =C(3,3) According to this information, i think ur answer will be C(25,5) 0 votes 0 votes shivangi5 commented Oct 4, 2017 reply Follow Share Thanks this is what I was thinking 0 votes 0 votes Shubhanshu commented Oct 4, 2017 reply Follow Share @akash.dinkar12 2^ 25C5 this will happen if it is asked in the question about, how many different five set elements we may have at same time. ryt?? 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes For T ⊆ S it will be 25C5 For T ⊆ P(S ) it will be 2^25C5 Correct me if I am wrong!! Smriti012 answered Oct 4, 2017 Smriti012 comment Share Follow See all 0 reply Please log in or register to add a comment.