A lawyer selects 3 cases to review. The group of cases to select from include 8 robberies, 5 auto accidents,?

and 2 assault cases. What it the probability of selecting 1 of each. How to sit up and solve?A lawyer selects 3 cases to review. The group of cases to select from include 8 robberies, 5 auto accidents,?
if it is EXACTLY 1 of each,


we must know how many of ';others'; are there for the 3rd


since we don't know,


';selecting 1 of each'; here has to mean AT LEAST 1 of each





so reqd. probability


= [8C1*5C2 + 8C2*5C1] / 13C3


= 0.7692


------------