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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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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

User Desilijic
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3 votes
the answer is 4 of 28. i think so 
User Chiara Perino
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3 votes
a) This is sampling without replacement.

P(all\ 2\ bedroom)=(20C4)/(28C4)=(20*19*18*17)/(28*27*26*25)
User Arleen
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