SOLUTION: 60% of large purchases made at a certain computer retailer are personal computer, 30% are laptop computers and 10% are peripheral devices such as printers. as part of an audit, one

Question 1063517: 60% of large purchases made at a certain computer retailer are personal computer, 30% are laptop computers and 10% are peripheral devices such as printers. as part of an audit, one purchase record is sampled at random
A) what is the probability that it is a personal computer?
b) what is the probability that it is either a personal computer or laptop computer ?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Probability it is a PC = 0.6
Probability it is a PC or a Laptop is the sum of both probabilities, since it is not possible for their to be overlap in this wording--0.9. Or means one or the other or both, but here, both is not an option.
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