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Question

If A = { a , b, c, d, e}, B = { c, d, e, f }, C = {b, d}, D = { a , e}
then which of the following statements are true and which are false ?
( i ) C B ( ii ) A D ( iii ) D B ( iv ) DA ( v ) B A (vi) C A

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Solution

We have, A = {a , b, c, d, e}, B = {c, d, e, f }, C = {b, d}, D = {a, e}
(i) Since, bC but bB

So, C B is false.

(ii) Since, bA but bD

So, A D is false.

(iii) Since, aD but aB

So, D B is false.

(iv) Since, all elements of set D is in set A.

So, D A is true.

(v) Since, fB but fA

So, B A is false.

(vi) Since, all elements of set C is in set A.

So, C A

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