MATH 425 Midterm: Midterm 1 Solutions
Document Summary
Math/stats 425 (instructor: edward ionides: in a group of students, 70% are democrat and 30% republican. Of the democrats, 60% support introduction of a ban on assault ri es. 30% of the republicans are in favor of such a ban. If a randomly selected student opposes a ban, what is the chance that the student is. Solution: let r = {student is republican} and s = {student supports a ban}. P(s c | r)p(r) + p(s c | rc)p(rc) Solution: s = {5 card poker hands}, e = {hand is worth a pair}. 5(cid:1) (b) find an expression for the chance that the hand contains two pairs (i. e. , two cards of one rank, two of another rank and a fth card of yet another rank). Solution: selecting ranks for the two pairs, followed by suits for each pair, followed by a rank and suit for the remaining card, we get.
