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MATH_221_HOMEWORK_03_HINTS_SU_10

# MATH_221_HOMEWORK_03_HINTS_SU_10 - MATH 221 Statistics for...

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MATH 221 Statistics for Decision Making Assignment 3    Student Name Answer Key Section  Instructor Due Date   Exercis e 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Total  Points 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 100   points  Score Textbook Reading Assignment Read Chapter(s) 4 in the Elementary Statistics  textbook.    Introduction to Probability For problems  (1)  through  (25)  , select the correct answer.    (1) The formula for commuting a " classical " probability  P   of any event  , when all the  outcomes are equally probable, is:     =    s n where  n   is the total number of outcomes and  s   is the number of successes. If the probability of some event is 5  %  , and the number of successes is 20 , find  ,   the  total number for outcomes.    (a)     200 (b)     400 (c)     4   (d)     40 (e)     100      (2) There are four aces in a standard deck of 52 playing cards.  What is the probability of  drawing an ace from a well - shuffled deck of 52 playing cards?   Express your answer as a fraction, in reduced formed.     1      /     13           (3) A number is chosen at random from the set of numbers 1 to 50 .  What is the probability  that the number is divisible by 9 ?  Note:   a number is divisible by 9 if the sum of the  digits is divisible by 9 .  Express your answer as a fraction, in reduced formed.

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