The hexadecimal representation of (55)₈ is

The encryption function f (p) = (3p − 2) mod 26 encrypt the letter K into

If C = {m, o, h, a, m, e, d}, then |P(C)| =  

 The number of elements in the power set of the set {{a, b}, c} is : 

In a group of 60 students. 45 students speak Arabic and 25 students can speak English and Arabic both, then how many students can speak only English?

1.   For a set A, the power set of A is denoted by 2^^A. If A = {5, {6}, {7}}, which of the following options are True. 

I.Φ ϵ 2^^A       II.  Φ⊆ 2^^A       III. {5,{6}} ϵ 2^^A     IV. {5,{6}} ⊆ 2^^A