SOLUTION: If set a={1,3,5} then the number of possible subset of a is ?

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Question 464902: If set a={1,3,5} then the number of possible subset of a is ?
Answer by solver91311(24713) About Me  (Show Source):
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Since there are 3 elements in the set and since the null set is a subset of every set, calculate the sum

Hint: The 4th row of Pascal's Triangle.

Where is the number of combinations of things taken at a time and is calculated by

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