Answered

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A group of 2129 students were surveyed about the courses they were taking at their college with the following results:

921 students said they were taking History.
987 students said they were taking Dance.
1012 students said they were taking Psychology.
474 students said they were taking Dance and History.
466 students said they were taking Psychology and History.
457 students said they were taking Dance and Psychology.
235 students said they were taking all three courses.

a) How many students took Dance or didn't take Psychology?
b) How many students took Dance & Psychology or took Psychology & History?
c) How many students took Dance, Psychology, or History?
d) How many students took Dance or History, but not Psychology?
e) How many students took none of the courses?
f) How many students took Psychology and History, but not Dance?

Sagot :

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