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9th
10th
11
th
12
Totals
Eat in
YES
130
175
122
68
495
cafeteria?
NO
18
34
88
170
310
Totals
148
209
210
238
805
a) If you choose a student at random, what is the probability he/she eats regularly in the
cafeteria?
b) If you choose a student at random, what is the probability he/she eats regularly in the
cafeteria, given that he or she is in 10th grade?
c) If you choose a student at random, are the events &quot;10th grade&quot; and &quot;eats regularly in the
cafeteria&quot; independent? Explain how you know.

a total number of students = 805 number of students eating in cafeteria = 495 probability of eating in cafeteria = number of... View the full answer

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