SOLUTION: Computer keyboard failures are due to faulty electrical connects(12%)or mechanical defects (88%). Mechanical defects are related to loose keys (27% or improper assembly (73%). Elec

Algebra ->  Probability-and-statistics -> SOLUTION: Computer keyboard failures are due to faulty electrical connects(12%)or mechanical defects (88%). Mechanical defects are related to loose keys (27% or improper assembly (73%). Elec      Log On


   

Question 1132797: Computer keyboard failures are due to faulty electrical connects(12%)or mechanical defects (88%). Mechanical defects are related to loose keys (27% or improper assembly (73%). Electrical connect defect are caused by defective wires (35%), improper connections(13%), or poorly welded wires(52%).
(a) find the probability that the failure is due to loose keys.
(b) find the probability that a failure is due to improperly connected or poorly welded wires
Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
.
(a)   find the probability that the failure is due to loose keys. 

    0.88*0.27 = 0.2376 = 23.76%.            ANSWER


(b)   find the probability that a failure is due to improperly connected or poorly welded wires 

    0.12*(0.13 + 0.52) = 0.078 = 7.8%.      ANSWER


The formulas are self-explanatory . . .