SAT Math: Statistics and Probability Drill 1, Problem 2

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SAT Math 1.1 Statistics and Probability 
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SAT Math 1.2 Statistics and Probability 
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SAT Math 1.3 Statistics and Probability 
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SAT Math 1.4 Statistics and Probability 
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SAT Math 1.5 Statistics and Probability 
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SAT Math 2.3 Statistics and Probability 
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SAT Math 2.4 Statistics and Probability 
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SAT Math 3.1 Statistics and Probability