PT141.S2.Q21 > Explanation

SECTION 1 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7

PASSAGE 2

Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15

PASSAGE 3

Question 16 Question 17 Question 18 Question 19 Question 20 Question 21

PASSAGE 4

Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 2 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23 Question 24 Question 25

SECTION 3 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7

PASSAGE 2

Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14

PASSAGE 3

Question 15 Question 16 Question 17 Question 18 Question 19 Question 20

PASSAGE 4

Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 4 · lr

We don’t know anything about everyone who got a grade of A minus or higher. We know about everyone who got a grade lower than B minus; but this doesn’t tell us anything about people who got a grade of A minus or higher.

This reverses the second statement. We know everyone who got a grade lower than B minus missed at least one class session. This doesn’t imply that most people who missed at least one class session got a grade lower than B minus. “All X are Y” does not imply “Most Y are X.”

Although we know that most of the students did not get a grade lower than B minus, this doesn’t imply that they got a grade HIGHER than a B minus. They could have all received B minuses.

We know that all students who got a grade lower than a B minus missed at least one class session. This doesn’t imply that some students who got a B minus or higher missed a class session. Maybe the ones who got a B minus or higher attended every class.

Must be true based on the first statement and the contrapositive of the second statement. Over half of the students attended every class session. Everyone who attended every class session did NOT get a grade lower than a B minus (in other words, B minus or higher).

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PrepTest 141 - Section 2 - Question 21

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