Hypergeometric Probability Distributions Worksheet 1. a. Determine the probability distribution, in table form and graphical form, for the number of students selected to be in a six-person fund-raising committee from 9 students and 11 teachers. b. What is the expected number of students on the committee? 2. A teacher's drawer contains 6 pens, 7 pencils, 3 markers and 4 hilighters jumbled together. What is the expected number of pencils among seven writing utensils grabbed from the drawer? 3. A school's faith awareness group consists of 15 students and 3 teachers. If four members of the group are randomly chosen to go on a retreat, determine the probability of selecting three students. 4. In an attempt to determine the number of $20 bills in active circulation a bank marked 300 bills with an invisible ink. The bills were then released to the public. In a sample of 1000 bills taken six weeks later, 34 had the invisible mark. Estimate the number of $20 bills in circulation in this area. HINT: Use the expected value formula. You are trying to determine "n"