A study of fathers’ involvement in their children’s education interviews a sample of fathers of school-age children. One question concerns regularly scheduled parent-teacher conferences.  Here is a two-way table of the results:     Attended all Attended some but not all Attended none Fathers in two-parent families 109 132 203 Fathers in single-parent families 15 10 13 Non-resident fathers 11 25 82   6. How many fathers were interviewed?   A)  135          B)  444          C)  600          D)  444,000          E)  600,000

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