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Question

Let A = {2, 3, 4, 5, 6, 7} B = {2, 4, 7, 8) C = {2, 4} ,then which of the following statements are True?
(a) B A
(b) C A
(c) B C
(d) C B

A
Both (a) and (d)
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B
Both (b) and (d)
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C
only (d)
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D
only (b)
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Solution

The correct option is C Both (b) and (d)
Given A={2,3,4,5,6,7},B={2,4,7,8},C={2,4}
Let us find which of the following statements are true.
(a) Consider BA
Since 8A,BA
Therefore the statement "BA" is not true.
(b) Consider CA
Since 2,4A,CA
Therefore the statement "CA" is true.
(c) Consider BC
Since 7,8C,BC
Therefore the statement "BC" is not true.
(d) Consider CB
Since 2,4B,CB
Therefore the statement "CB" is true.
Thus both (b) and (d) are true.

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