Ways in which hotel can purchase TVs from shipment with defects

0	A shipment of 12 TV sets contain 3 defective sets. in how many ways can a hotel purchase 5 of these sets and receive at least 2 of the defective sets? maths asked Feb 17 '12 at 01:17 oakbytes 1.4k●55●65●80

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Hotel can get at least 2 defective sets in two cases
(a) 2 defective sets and 3 non defective sets - ³C₂ x ⁹C₃ = 252 ways
(b) 3 defective sets and 2 non defective sets - ³C₃ x ⁹C₂ = 36 ways
The total number of ways is 288 ways

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answered Apr 09 '12 at 01:28

oakbytes
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Ways in which hotel can purchase TVs from shipment with defects

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