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Disjoint Sets

If A = x : x ...

Question

If A = {x : x is a composite number} and
B = {x : x is a prime number}, then clearly sets A and B are ________ sets.

A

disjoint sets

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B

finite sets

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C

empty sets

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D

equal sets

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Solution

The correct option is A disjoint sets
A = {4, 6, 8, 9,...... } and B = {2, 3, 5, ......}.
Two sets are said to be disjoint, if they have no elements in common.
Here, in set A and set B there are no elements in common.
Hence, they are disjoint sets.

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