Question

Students who live in the dormitories at a certain four-year college must buy a meal plan

 Students who live in the dormitories at a certain four-year college must buy a meal plan. They must select from four avallable meal plams: 10 meals, 14 meals, 18 meals, or 21 meals per week. The Food and Housing Office has determined that 15% of students purchase 10 meal plan, 45% of students purchase the 14 meal plan, 30% purchase the 18 meal plan, 10% purchase the 21 meal plan.

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Answer #1
x = Number of meals Probability P(x) x*P(x) (x-u)2*P(x)
10 0.15 1.5 4.2135
14 0.45 6.3 0.7605
18 0.3 5.4 2.187
21 0.1 2.1 3.249
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