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An apartment building has 20 two-bedroom apartments and 8 three-bedroom apartments. If 4 apartments are chosen at random to be redecorated, what are the probabilities a) All will be two-bedroom apartments

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carrah13
the answer is 4 of 28. i think so 
toporc
a) This is sampling without replacement.
[tex]P(all\ 2\ bedroom)=\frac{20C4}{28C4}=\frac{20\times19\times18\times17}{28\times27\times26\times25}[/tex]

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