ECO 480 Lecture 3: Chapter 3 exercise
15 Feb 2018
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This is in class exercise is for chapter 3. If you toss a coin 100 times, and record how often it comes up heads. Answer: since pr(head)=0. 5, so my best guess would be 0. 5*100=50: toss a coin 2 times, write down the outcome sets. Answer: s={hh,ht,th,tt: let event e: at least one head, compute pr(e) Answer: pr(e)=0. 5*0. 5+0. 5*0. 5+0. 5*0. 5=0. 75 or 3/4: what is e_bar, compute pr(e_bar) In a certain college, the students engage in sports in the following proportions: football (f), 20%; Basketball (b), 50%; both football and basketball, 15%. What is the chance that a student selected at random will: a. Answer: we are given pr(f)=0. 2, pr(b)=0. 5, pr(f and b)=0. 15: pr(f or b)=pr(f)+pr(b)-pr(f and b)=0. 2+0. 5-0. 15=0. 55, the complements for playing neither sport is play at least one sport, so. In a family of three children, what is the change of: at least one girl, at least two girl, given at least one girl.
