Question

a math tutor working with a small study group has classified students in the group by whether or not they scored 90% or above on each of three tests. the results are shown in the venn diagram to the right. use the venn diagram to represent the set of students who scored 90% or above on exam 2 or not on exam 1 in roster form. choose the set of students who scored 90% or above on exam 2 or not on exam 1. o a. {ny, roz, al, oli, eva, jen, gus, mel, cam, flo, pat, lon} o b. {roz, al, oli, jen, gus, mel, cam, flo, pat, lon} o c. {ken, don, ny, roz, al, oli, eva, ben, hui, jen, gus, mel, cam, f o d. {ny, roz, al, oli, eva, jen, gus, mel}

Explanation:

Step1: Find students who scored ≥90% on exam 2

Students in exam 2 (≥90%) circle: Ny, Roz, Al, Oli, Eva.

Step2: Find students not in exam 1 (≥90%) circle

Students not in exam 1 (≥90%) circle: Jen, Gus, Mel, Cam, Flo, Pat, Lon.

Step3: Combine the two sets

Combine the two sets using the union operation.

Answer:

A. {Ny, Roz, Al, Oli, Eva, Jen, Gus, Mel, Cam, Flo, Pat, Lon}