Suppose we have 2 events: . We know: What is ? ---------- I know that and that but I sort of go around in circles...
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Originally Posted by scorpion007 Suppose we have 2 events: . We know: What is ? ---------- I know that and that but I sort of go around in circles... hi P(e|s)=P(S n e)/p(s) P(S n e)= P(s) ---1 P(e|s')=P(s' n e)/P(s') 0.15=[P(e)-P(S n e)]/[1-P(s)] 0.15[1-P(s)]=0.7-P(s) from 1
Hello, scorpion007! We know: . What is ? I filled in a chart . . . From [1]: . . . From [3]: . Hence: . . . From [2]: . Hence: . . . Reading across, we have: . From [2], we have: . Therefore: .
thank you both very much!
Originally Posted by mathaddict 0.15=[P(e)-P(S n e)]/[1-P(s)] is it true in general that ?
Originally Posted by scorpion007 is it true in general that ? in general P(A n B')=P(A)-P(A n B) It should be clear when you draw the sets
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