Question

Learning Objective - be able to calculate condltional probaolllties Trom tabulated data A central heating installation and maintenance engineer keeps a record of the causes of failure of systems he is called out to repair. The causes of failure are classified as 'electrical, 'gas', or in some cases 'other. A summary of the records kept of failures involving either gas or electrical faults is as follows: Electrical Yes No Gas Yes 32 22 No 25 34 Enter your answers to 3 decimal places or as a fraction in the form a/b. Probability that failure involves gas given that it involves electricity Number Probability that failure involves electricity given that it involves gas Number

Answer 1