" If "A={" Rhombuses "},B={" Rectangles "}," then "A nn B=

If A = {Rhombuses}, B = {Rectangles}, then A cap B =

If A sub B, then (A'nn B')=?

Show that If A sube B then A nn B=A

Given, A = {Quadrilaterals}, B = {Rectangles}, C = {Squares}, D = {Rhombuses}. State, giving reasons, whether the following are true or false. (i) B sub C , (ii) D sub B , (iii) C sube B sube A , (iv) D sub A , (v) B supe C , (iv) A supe B supe C

Prove that (i) A nn B sube A( ii) A nn B sube B( iii) If C sube A and C subebar(B), then C sube A nn B( iv )A=B rArr A nn C=B nn C for any set C, (v) If B sube A, then A nn B=B and conversely.

If A={a,b,c,d},B={b,c,e},C={a,e} verify that A nn(B-C)=(A nn B)-(A nn C) .

If A = B' , then (A nn B)' is "____" .