A survey was conducted of 450 high school students asking which class they prefer, math or
history and the data was broken down by grade level.
High School Students' Subject Preferences
Math
History
Total
Freshmen
115
Sophomore
120
Junior
110
Senior
105
Total
450
Part A: If 84 freshmen prefer math, 60 sophomores prefer math, 65 juniors prefer history and 45 seniors prefer history. how many students overall perfer math.
choices:249,144,201,110
part b: What is the marginal relative frequency of those who prefer math?
choices:0.244,0.32,0.447,0.553
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