Lumos StepUp High School Algebra 1 - Mathematics Practice test + Workbook Two way freqency tables

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A survey of $$5{\rm th}\; {\rm and}\; 6{\rm th}$$ graders was conducted to see whether they did their homework using a pen or a pencil. The result of the survey is in the table. Based on the survey, what is the probability that a student, selected at random, is a $$5{\rm th}$$ grade student who does his/her homework with a pen? Enter your answer as a simplified fraction.

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