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Question

Of the following two statements, both of which cannot be true, both can also be false. Which are these two statements?

I. All machines make noise

II. Some machines are noisy

III. No machine makes noise

IV. Some machines are not noisy

A I & II Correct Answer Incorrect Answer
B III & IV Correct Answer Incorrect Answer
C I & III Correct Answer Incorrect Answer
D II & IV Correct Answer Incorrect Answer

Solution

All machines make noise No machine makes noise Both are statement cannot be true also both can be false Hence,  I & III 

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