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6) You may answer the following questions using the appropriate C(n,r)’s and or P(n,r)’s. It is...

6) You may answer the following questions using the appropriate C(n,r)’s and or P(n,r)’s. It is NOT necessary to give a numerical answer.

a) 10 points - A computer password consists of 6 different capital letters followed by 4 different digits. How many computer passwords are possible?

b) 10 points - An electronics store receives a shipment of 50 graphing calculators, 7 of which are defective. 9 of these calculators are sold to a local high school. In how many ways can exactly 3 of them be defective?

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