(Q5).Show that the sets C and B are equal, where

C = {x : x is a letter in the word ‘ASSASSINATION’}

B = {x : x is a letter in the word STATION}

Given that C = {x : x is a letter in the word ‘ASSASSINATION’}

The roster form of the set C = {,,,,,}, since elements in a set cannot be repeated.

Also given that B = {x : x is a letter in the word STATION}

‘B’ can also be written as B = {,,,,,}

So, the elements of C and B are same and C = .

i.e. C ⊆ B, B ⊆ C ⇒ C=