Pressurized air is being used in a manufacturing company in its daily operation. There are three compressors in service: two-screw type compressors, (S1, S2) and one-reciprocal type compressor, (R). Each compressor, at any given time, is either off (0), or on (1). Assume that event A denoted to reciprocal compressor (R) that is always off. Event B is denoted that at least one of the screw types of compressors is always on. P(A)=41% and P(A∪B) =97% If Probability of “all compressors are off" is 2%; Compute P(B) ?

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