A survey of the last 105 cars that have been brought to an automobile dealership

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A survey of the last 105 cars that have been brought to an automobile dealership for repair produced the following data.

28 had brake repairshad brake and exhaust repairs
21 had exhaust repairshad brake and transmission repairs
13 had transmission repairshad exhaust and transmission repairs


If 1 cars had all three repairs performed, How many had...

exactly one of these three repairs done
none of these three repairs done
exactly two of these three repairs done

Sep 4th, 2015

Thank you for the opportunity to help you with your question!

a) Number of cars with exactly one of the repairs done = 28 brake repairs+21 exhaust repairs+ 13 transmission repairs = 28+21+13= 62

b) total number of cars =105

total cars repaired = 28+21+13+8+6+3+1=80

number of cars without any repair =105-80 =25

c) Number of cars with exactly two repairs = 8+6+3 = 17

Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 4th, 2015

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