Test 1b Solution

Test 1b Solution - STAT 230 Quiz #1 Sept 29, 2004 For all...

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STAT 230 Quiz #1 Sept 29, 2004 For all of the problems below, show your work in the space indicated! Name: I.D. No.: Section No. [____/12] 1. Four digits are selected from 1,2, ,9 without replacement and randomly placed in a row. [4] (a) What is your sample space S for this random experiment? How many points are in S ? A possible choice of sample space S 1234,2134,3214,. ....6789 i.e. all arrangements of 4 things taken from 9. There are 9 4 points in this S . (note-there are other alternative solutions as well) [4] (b) What is the probability that the first digit is 1 and last digit is 9? There is 1 way of choosing the number (1 for the first digit, for each of these, 1 way of choosing the number 9 for the last digit and 7 6 ways of choosing a numbers from the remaining for the remaining middle digits. Therefore 1 7 6 1 9 8 7 6 [4] (c) What is the probability of the arrangement (odd number,odd number, even number, even number)?
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Test 1b Solution - STAT 230 Quiz #1 Sept 29, 2004 For all...

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