Schools, he said, _____ to look after the needs of gifted children
have failed
are failing
have been failing
were failing
An electronic assembly consists of two subsystems, 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
P (A fails/B has failed )
P(A fails alone)