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can numbers in a set repeat?

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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can numbers in a set repeat?

by capnx » Sat Sep 26, 2009 12:00 pm
just need some clarifications

can numbers in a set appear more than once?

ie: what is the difference between sets S{2, 3, 5, 5, 7} and R{2,3,5,7}? is S even considered a set?

I guess i'm confused between a data set and a number set...
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Re: Can numbers in a set repeat?

by nand358 » Thu Oct 01, 2009 7:32 am
I am quoting the definition of a set from :
https://math.wikia.com/wiki/Set

A set is a collection of distinct, unordered objects.

So, S from your example, is NOT a set.
R is a set because it is a collection of distinct, unordered objects.
Thanks,

Nand
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