easy · GMAT Quant
An automated sorting machine processes 100 packages. 28 packages are 'Expedited' and have no numerical tracking ID. The other 72 packages are 'Regular' and have IDs numbered 1 through 18, with exactly four packages of each ID.
If a package is not 'Expedited', what is the probability its ID is a prime number?
- dfrac718
- dfrac725
- dfrac49
- dfrac1118
- dfrac13
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