The number of non-empty subsets of the set is

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answer is B.

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Detailed Solution

Sets can be of different types. The above set is a finite set because it contains only a finite number of elements and we know that there are exactly four elements in the set.
The set contain four elements i.e

Then number of non-empty subsets =

The subsets are:

The number of non-empty subsets of the set

is 15.
Hence, Option (2) is the correct answer.

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