Of 100 patients investigated, 17 carry gene A, 33 carry gene B and 67 carry neither. Find the probability that a patient carries only gene A,only gene B or both.
Of 100 patients investigated, 17 carry gene A, 33 carry gene B and 67 carry neither. Find the probability that a patient carries only gene A,only gene B or both.
100 patients
67 have neither
33 must have a or b or both
33 have b
17 have a
17 have a and b