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Mathematics, 15.07.2019 14:00 thanerose

Mason conducted a survey of his class to determine if they prefer to use pens or pencils for their math homework.  out of the  30 students  in his class, 12 of them are male.  a total of  21 students  said they prefer pencils, and 12 of those students are female. fill in the missing joint and marginal frequencies in the table.

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