Two Hundred People Were Asked If They Had Read a Book

Multiple Choice

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. Given that a respondent read a book in the last month, the probability that he or she is at least 30 years old is the closest to ________.

A) 0.33
B) 0.46
C) 0.65
D) 0.88