The two-way table summarizes data on whether students at a certain high school eat regularly in the school cafeteria by grade level. 9th10th11th12thTotalYes13017512268495No183488170310Total148209210238805 If you choose a student at random, what is the probability that the student eats regularly in the cafeteria and is not a 10th-grader?

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lobeflepnoumni · Accepted Answer

Step 1 The table contains 805 students in total (which is given in the bottom right corner of the table), while 130+122+68=320 of the 805 students eat regularly in the cafeteria and is not a 10th graders (since 130 is mentioned in the row &#039;&#039;Yes&#039;&#039; and in the column &#039;&#039;9th&#039;&#039; of the given table, 122 is mentioned in the row &#039;&#039;Yes&#039;&#039; and in the column &#039;&#039;11th&#039;&#039; of the given table, 68 is mentioned in the row &#039;&#039;Yes&#039;&#039; and in the column &#039;&#039;12th&#039;&#039; of the given table). The probability is the number of favorable outcomes divided by the number of possible outcomes:  №№P(Yes and not 10th)=№ of favorable outcomes№ of possible outcomes=320805=64161≈0.3975=39.75%

The two-way table summarizes data on whether students at a certain high school e

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