hard · GMAT Quant

A production line labels 48 crates. 8 crates are 'Empty' and contain no serial numbers. The remaining 40 crates are 'Loaded' and are assigned serial numbers 1 through 10, with exactly four crates for each number.

If a crate is chosen at random and is not 'Empty', what is the probability its serial number is not prime?

  1. dfrac35
  2. dfrac25
  3. dfrac12
  4. dfrac14
  5. dfrac56

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