Which of the following are sets ? Justify your answer.
A team of eleven best-cricket batsmen of the world.
Which of the following are sets ? Justify your answer.
A team of eleven best-cricket batsmen of the world.
A team of eleven best cricket batsmen of the world is not a well-defined collection because the criteria for determining a batsman's talent may vary from person to person.
Hence, this collection is not a set.
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$\{ a,b\} \not\subset \{ b,c,a\} $
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$\{1,2,3 \ldots .\}$
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$\mathrm{E} =$ The set of all letters in the world $\mathrm{TRIGONOMETRY}$
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$\mathrm{E} =$ The set of all letters in the world $\mathrm{TRIGONOMETRY}$
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