If `A={0,1,2,3,4,5}` ,then `n(A)` is
`(A) 5`
`(B) 6`
`(C) 7`
`(D) 8`

If the rank of the matrix A= [(1,2,3,0),(2,4,3,2),(3,2,1,3),(6,8,7,alpha)] is 3 then a= (A) -5 (B) 5 (C) 4 (D) 4

If ^(n+1)C_3=2.^nC_2, then n= (A) 3 (B) 4 (C) 5 (D) 6

If A = {1, 2, 3, 4} , then B = {2, 4, 5, 6} and C = {1, 2, 5, 7, 8} , then (A cup C) cap B is equal to :

If in an A.P., S_(2n)=3.S_(n) then S_(3n) : S _(n) = (a)5 (b) 6 (c)7 (d)8

If mu ={1,2,3,4,5,6,7,8) and A={2,5,8} then find n(A)

If the matrix A=[[1,2,3,0],[2,4,3,2],[3,2,1,3],[6,8,7,alpha]] is of rank 3 then alpha= (A) -5 (B) 5 (C) 4 (D) -4

If ={1,2,3,4,5,6},B={4,5,6,7,8},C={4,5,6}, then A nn B

If A= {1,2,3,4,5,6} and B= {3,4,5,6,7,8,} , then (A-B) uu(B-A) = …………….