SOLUTION: A shipment of 29 flat screen televisions contains three defective units. In how many ways can a vending company purchase four of these units and receive the following? (a) all g

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Question 1179091: A shipment of 29 flat screen televisions contains three defective units. In how many ways can a vending company purchase four of these units and receive the following?
(a) all good units
(b) two good units
(c) at least two good units
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
29 units: 26(good) and 3(def)
purchase 4: Ways...
(a) all good units: 26C4 = 14,950
(b) two good units: (26C2)(3C2) = 975
(c) at least two good units:
 (26C2)(3C2) + (26C3)(3C1) + 26C4 = 14,950 + 7800 + 975
Wish You the Best in your Studies.


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