Lucy collects data from a random sample of seventh-graders. Out of 40 respondents, 7 attend afterschool programs. Of the 200 seventh-graders attending Lucy’s school, how many would be expected to attend afterschool programs?
A. 14 seventh-graders
B. 28 seventh-graders
C. 35 seventh-graders
D. 42 seventh-graders
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Answer:
total Respondents = 40
attended =7
probability = 7/40
now respondents = 40*5 =200
then new probability = 7 *5
= 35 seventh graders
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