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Let $$S = \{1, 2, 3, 4, 5, 6\}$$. Then the number of one-one functions $$f: S \to P(S)$$, where $$P(S)$$ denote the power set of $$S$$, such that $$f(n) \subset f(m)$$ where $$n < m$$ is
Correct Answer: 3240
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