Question

An electronic assembly consists of two subsystem say, A and B. From previous testing procedures, the following probabilities are assumed to be known : 

P (A fails) = 0.2 

P (B fails alone) = 0.15 

P (A and B fail) = 0.15 

Evaluate the following probabilities 

(i) P (A fails/B has failed) 

(ii) P (A fails alone).

Answer 1

Let events A unsuccess is \(\bar{A}\) and B unsuccess is \(\bar{B}\)