A) 64
B) 32
C) 40
D) 20
Correct Answer: B
Solution :
\[S=\,\,\,\,\{0,\,1,\,5,\,4,\,7\}\], then, total number of subsets of S is \[{{2}^{n}}\]. Hence, \[{{2}^{5}}=32\].
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