How many subsets does a set containing 8 elements have?

Question: How many subsets does a set containing 8 elements have?

  1. 257
  2. 255
  3. 258
  4. 256

Correct Answer: D — 256

Explanation: Each element may be included or excluded, giving 2ⁿ possible subsets.
Using the values in this question gives 256 as the correct answer.

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