Let S be an infinite set and S1,S2,……Sn be sets such that S1∪S2∪⋯∪Sn=S. Then
A
At least one of the sets S1 is a finite set
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B
Not more than one of the sets S1 can be finite
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C
At least one of sets S1 is infinite
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D
Not more than one the sets S1 is an infinite set.
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Solution
The correct option is C At least one of sets S1 is infinite S=S1∪S2∪S3∪…∪Sn
For S to be infinite set, atleast one of sets Si must be infinite, since if all Si were finite, then S will also be finite.