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Unformatted text preview: System Homepage Class Homepage Student Details Student Assignment Details Die Coin Stat 230 W09 : Gradebook Welcome PoWei Chuang [ My Profile ] Assignment detail for PoWei Chuang in Online Quiz 1: PoWei Chuang Login: pchuang Email: pchuang@uwaterloo.ca Student ID: 20260696 Assignments completed: 22 Assignments active: Question Grade 1 An experiment generates events as follows: First a 6sided die is tossed. Next as many coins as the number on the die face are tossed. For example possible elements of this experiments Sample Space are {2,TT}, {4,HTHT}, {1,T}, {1,H}. How many elements are in the Sample Space? Your Answer: 126 Comment: Let's find how many points have the die value n where n is from {1,2,3,4,5,6}. Each element for this roll will have the form { n ,C 1 C 2 ...C n } where each C i is H or T. There are 2 n ways to have a sequence of n H's and T's. Thus there are 2 n elements in the sample space associated with die roll n . In total then we have 2 1 + 2 2 + .. + 2 6 = 126 elements. Instructors Comment: 1.0 2 A 4 digit code number is generated by randomly selecting digits, without replacement , from the set {1,2,3,...,9}. Find the probability that the number is even. Your Answer: 4/9 Comment: First determine how many possible 4 digit code numbers there are: 9 ways to pick the first, then 8 ways for the second, etc. so there are 9*8*7*6 possible 4 digit numbers. How many ways can you select an even number? There are 4 evennumbers to select from for the last digit....
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This note was uploaded on 03/24/2010 for the course STAT 230 taught by Professor Various during the Winter '06 term at Waterloo.
 Winter '06
 various

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