At the Annual 7th grade breakfast, the teachers buy the students a breakfast of bagels and juice. The table below shows the rela
tionship between the number of students attending the breakfast and the total cost. If C=mS, where Cis the cost of S students and m is the constant of proportionality, what is the value of x? In June, the 7th grade teachers bought breakfast for150 students. What was the total cost? Show your work.
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There are some numbers missing in your table. We think the values are supposed to be the ones shown in the attachment.
The number of people that are older than 35 and have a hemoglobin level between 9 and 11 is 46. The total number of people older than 35 is 162, so the proportion of people older than 35 with the hemoglobin level of interest is ...
... 46/162 ≈ 0.284
The appropriate choice is B. 0.284.
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<em>Here's how you get there with the formula for conditional probability.</em>
P(9-11 | >35) = P(9-11 & >35)/P(>35) . . . . conditional probability formula
P(9-11 | >35) = (46/429) / (162/429) = 46/162
