157 If R is the event that a convict committed armed robbery

1.57 If R is the event that a convict committed armed robbery and D is the event that the convict sold drugs, state in words what probabilities are expressed by

(a) P(R|D);

(b) P(D|R);

(c) P(R|D).

Solution

(a)The probability that a convict who sold drugs, also committed armed robbery.

(b) The probability that a convict who committed armed robbery, did not sell drugs.

(c) The probability that a convict who did not sell drugs also did not commit armed