Question

For two sets A and B if sup A <sup B, show that there exists an element b ∈ Bthat is an upper

bound for A​

Answer 1

Question

A and B are two sets such that n(A−B)=32+x,n(B−A)=5x and n(A∩B)=x Illustrate the information by means of a Venn diagram. Given that n(A)=n(B). 

Calculate (i) The value of x  (ii) n(A∪B).

Answer of the above mentioned.