Question

Out of 50 students taking a psychology exam, 23 answered the first of two bonus questions, 34 answered the second bonus question, and 3 didn't bother with either one. Round your answer to the nearest percent. (a) What percentage of students tried both questions? (b) What percentage tried at least one question? 

          Out of 50 students taking a psychology
exam, 23 answered the first of two bonus
questions, 34 answered the second bonus question,
and 3 didn't bother with either one. Round your answer to
the nearest percent.
(a) What percentage of students tried both questions?
(b) What percentage tried at least one question?
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Added by John M.

Calculus: Early Transcendentals
Calculus: Early Transcendentals
James Stewart 8th Edition
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Out of 50 students taking a psychology exam, 23 answered the first of two bonus questions, 34 answered the second bonus question, and 3 didn't bother with either one. Round your answer to the nearest percent. (a) What percentage of students tried both questions? (b) What percentage tried at least one question?
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Transcript

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0:00 Hello everyone.
00:01 So here in this question, let a denotes the students who answered the first of two bonus question and b denotes the students who answered the second bonus question.
00:13 And let us take u denotes the universal set...
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