"Some box contains 11 or more balls."(adsbygoogle = window.adsbygoogle || []).push({});

My answer:

Not (some box contains 11 or more balls)

[tex]\equiv[/tex] (not some box contains 11) and (more balls) {by de Morgan}

[tex]\equiv[/tex] no box contains 11 and more balls

Is this correct?

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# Proposition Negation

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