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A study of 160 students, who took at least one math course, conducted at Summerisle Community College, revealed that 60% of students who have taken Introduction to Statistics graduate in four years, 45% of students who have taken College Algebra graduate in four years, and 75% of students who have taken Calculus graduate in four years. What variables are being studied?

A. How long it takes a student to graduate
B. Math classes a student takes
C. The number of students who take College Algebra
D. The number of students who graduate in four years

User Fermmm
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Answer:

D and C

Explanation:

User Jorgenfb
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