A signal which can be green or red with probability 4/5 or 1/5 respectively,is received by station A and transmitted to station B,the probablity of each station receiving the signal coreectly is 3/4.if hte signal received at station B is green,then the probabilty of original signal was red is?
Solution
Green and correct 4/5 *3/4= 12/20
Green and incorrect 4/5 *1/4= 4/20
Red and correct 1/5 *3/4= 3/30
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