Exhibit 4-1

question 9

Multiple Choice

Exhibit 4-1.Two hundred people were asked if they had read a book in the last month.The accompanying contingency table,cross-classified by age,is produced. Refer to Exhibit 4-1.The probability that a respondent is at least 30 years old is closest to ______.

• A)0.33
• B)0.46
• C)0.50
• D)0.65

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