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Unformatted text preview: Prof. Matt Dobbs Page 1/4 Physics 257 Asst 2 Physics 257: Assignment 2 Answer Key Due in-class before 1:05pm Thursday September 27, 2007 Remember to use the correct number of significant figures for your answers where appropriate. Answers with incorrect significant figures will get zero marks. For plots, remember to label your axes correctly and use the graphs checklist on page 7 of the lab book. Graphs must be computer generated from now on. For each question, show all your steps. Assignments handed in after 1:05pm but before the end of the day will lose 25% of the grade. 1) You are playing a game involving three normal six sided dice. (for this question you may keep your answers as fractions) a) What is the probability of rolling a one, two, and three ? (1 mark) There is a P a = 3/6 chance the dice A will show a 1, 2 or 3. (e.g. lets say it shows 3) Dice B can show any 2 of the three numbers, so the probability is P b =2/6. (e.g. it might show 2 if 3 is already taken by dice A.) There is only one number dice C can show, so P c =1/6. (in our example it is 1). The combined total probability is P combined = P a P b P c = 3/6 2/6 1/6 = 6/216 = 0.0278 b) What is the probability of rolling three ones ? What is the probability of rolling three ones ?...
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This note was uploaded on 04/29/2008 for the course PHYS 230 taught by Professor Harris during the Fall '07 term at McGill.
- Fall '07