5.A shipment of 200microwavescontains twentydefective units. In how many ways can a vending company buy fifteenof thesemicrovavesand receivea. No defective units(2pts)b. Exactly two defective units.(2pts)c. At least one defective unit.(2pts)

Step-by-step explanation:

Total no. of goods, n = 200

no. of defective units in the goods, d = 20

hence the no. of proper units,

g = n-d

g = = 200-20

g = 180

a)

ways in which a vending company buys fifteen of these microwaves and receive no defective units be:

b)

ways in which a vending company buys fifteen of these microwaves and receive exactly two defective units be:

c)

ways in which a vending company buys fifteen of these microwaves and receive at least one defective units be: