A system consists of n identical components, each of which is operational with probability p. Independent of other components, the system is operational if at least k out of the n components are operational.
What is the probability that the system is operational?

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a. do i have the cash i need for down payment?

b. do i want to use my savings instead of credit?

c. can i afford the car?

d. can i use the credit in a better way?

e. could i put off buying the car for a while?

f. what will happen if i don't buy it now?

g. what are the costs of using credit?

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