Pre Algerbra

I'm confused on this one,

If n(A) = 8, then how many proper subsets are there?

I came up with 255. Is this correct?

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asked by tom
  1. for 8 elements, the number of subsets would be 2^8 which is 256

    This includes the null set and the set of all 8 elements.

    So excluding the null set there would be 256

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    posted by Anonymous

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