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An electrical circuit board in the main control panel of a machine has four components A, B, and C connected in parallel. 300 Unites.

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An electrical circuit board in the main control panel of a machine has four components A, B, and C connected in parallel. 300 Unites. of the circuit board were subjected to accelerated operation tests which have been equivalent to 5000 hrs of normal operation. The following data is available from the tests. Determine the reliability of the circuit board. Components No. of failures A 10 B 15 C 10

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