Explanation
Correct answer: B.
Choice B is correct. According to the table, students from the two high schools completed summer internships in . Of these, were from Valley High School. Therefore, of the students who completed summer internships in , represents the fraction who were from Valley High School.
Desmos solution:
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Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice A
Choice A is incorrect. This is the difference between the numbers of students from the two high schools who completed internships in divided by the total number of students from the two schools who completed internships that year.
Choice C
Choice C is incorrect. This is the fraction of students from Foothill High School who completed internships out of all the students who completed internships in .
Choice D
Choice D is incorrect. This is the number of students from Valley High School who completed internships in divided by the number of students from Foothill High School who completed internships in .