SOLUTION: I am drawing a blank on how to even start solving. A shipment of 40 graphing calculators contain 8 defective units. A college bookstore buys 20 of these units. a. What is the

Question 1021611: I am drawing a blank on how to even start solving.
A shipment of 40 graphing calculators contain 8 defective units. A college bookstore buys 20 of these units.
a. What is the probability of the bookstore receiving no defective units?
b. What is the probability of the bookstore receiving 2 defective units?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Your empirical probability of defective unit is .
Your empirical probability of non-defective unit is then .
Use the formula,

where X is the number of defective units.
a) No defective units ,

b) 2 defective units, ,

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