6 4 6 12 22 ?

Write true of false. i) 15 : 30 :: 30 : 40, ii) 22 : 11 :: 12 : 6, iii) 90 : 30 :: 36 : 12, iv) 30 : 64 :: 6 : 12, v) 25 : 1 :: 40 : 160.

Find the Variance of the following data: 6, 8, 10 , 12 , 14 , 16 , 18 , 20 , 22 , 24

1, 4, 2, 8, 6, 24, 22, 88, ….

The median of the items 6, 10, 4, 3, 11, 22, 18, is

Let A = {2, 4, 6, 8, 10, 12} and B = {3, 6, 9, 12, 15}. Find AuuB and AnnB .

Find the variance of the following data : 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.

If the 6^(th) terms and 11^(th) term of A.P. are 12 and 22 respectively, then find its 2^(nd) term ?

If 6^(th) term and 8^(th) term of an A.P. are 12 and 22 respectively, then find its 2^(nd) term.