How many subsets does the set $\{1, 2, 3\}$ have?
A$3$
B$6$
C$7$
D$8$
Answer & Solution
Correct answer: D. $8$
$2^{3} = 8$ subsets.
Full list: $\phi, \{1\}, \{2\}, \{3\}, \{1,2\}, \{1,3\}, \{2,3\}, \{1,2,3\}$ — eight in total.
- **C** ($7$) excludes either $\phi$ or the full set.
- **B** ($6 = 3!$) is the wrong formula.
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