Mathematics, 23.03.2021 21:10 ravenl1001

A computer technician notes that 40% of computers fail because of the hard drive, 20% fail due to the processor, 15% of problems are with the keyboard, and 5% of problems are due to something else. What is the mean of the
number of computers he will work on before seeing his first computer that has failed because of the hard drive?

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A computer technician notes that 40% of computers fail because of the hard drive, 20% fail due to th...