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28 Dec 2022, 02:30
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
72% (01:34) correct
28%
(01:51)
wrong
based on 135
sessions
History
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In Hill Dale High School, the percentage of students with grades above 80 percent is higher in the junior class than in the senior class, but the percentage of students with grades above 90 percent is higher in the senior class.
Which of the following must be true on the basis of the statements above?
A. The average class grade of the senior class is higher than that of the junior class
B. The number of students with grades above 80 percent is greater in the junior class than in the senior class
C. The number of students with grades lower than 80 percent is greater in the senior class than in the junior class
D. Some students in the junior class have grades between 80 percent and 90 percent.
E. The number of students with grades above 90 percent is higher in the senior class than in the junior class
Which of the following must be true on the basis of the statements above?
A. The average class grade of the senior class is higher than that of the junior class
B. The number of students with grades above 80 percent is greater in the junior class than in the senior class
C. The number of students with grades lower than 80 percent is greater in the senior class than in the junior class
D. Some students in the junior class have grades between 80 percent and 90 percent.
E. The number of students with grades above 90 percent is higher in the senior class than in the junior class
28 Dec 2022, 03:09
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The question says must be true i.e, 100% possibility.
Since we don't know the exact number of students in either junior or senior class, we cannot conclude anything about the number of students scoring above 80% and 90% in either class and hence cannot compare the numbers.
So, options A,B,C, and E are out.
D-is the correct option.
Since we don't know the exact number of students in either junior or senior class, we cannot conclude anything about the number of students scoring above 80% and 90% in either class and hence cannot compare the numbers.
So, options A,B,C, and E are out.
D-is the correct option.
wadhwakaran
Joined: 31 Mar 2022
Last visit: 22 Jul 2025
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Location: India
Concentration: General Management, International Business
Schools: INSEAD Aug'24 intake Oxford Said'25 Judge '25 Imperial'25 HEC Sep'24 Intake LBS '26 ISB '27
GMAT 1: 700 Q50 V35
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Schools: INSEAD Aug'24 intake Oxford Said'25 Judge '25 Imperial'25 HEC Sep'24 Intake LBS '26 ISB '27
GMAT 1: 700 Q50 V35
Posts: 260
28 Dec 2022, 09:25
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Let's do some math here
In Hill Dale High School, the percentage of students with grades above 80 percent is higher in the junior class than in the senior class, but the percentage of students with grades above 90 percent is higher in the senior class.
% students with grades above 80 percent in Junior Class= 80%
% students with grades above 80 percent in Senior Class= 60%
% students with grades above 80 percent in Junior Class= 10%
% students with grades above 80 percent in Senior Class= 20%
80-90% in Senior Class= 60-20=40%
80-90% in Junior Class= 80-10=70%
A. The average class grade of the senior class is higher than that of the junior class Incorrect because the average cannot be inferred from the given information
B. The number of students with grades above 80 percent is greater in the junior class than in the senior class Incorrect because the total number of students in senior class and junior class are not known, therefore, this cannot be inferred.
C. The number of students with grades lower than 80 percent is greater in the senior class than in the junior class Incorrect because the total number of students in senior class and junior class are not known, therefore, this cannot be inferred.
D. Some students in the junior class have grades between 80 percent and 90 percent. Correct
E. The number of students with grades above 90 percent is higher in the senior class than in the junior class Incorrect because the total number of students in senior class and junior class are not known, therefore, this cannot be inferred.
In Hill Dale High School, the percentage of students with grades above 80 percent is higher in the junior class than in the senior class, but the percentage of students with grades above 90 percent is higher in the senior class.
% students with grades above 80 percent in Junior Class= 80%
% students with grades above 80 percent in Senior Class= 60%
% students with grades above 80 percent in Junior Class= 10%
% students with grades above 80 percent in Senior Class= 20%
80-90% in Senior Class= 60-20=40%
80-90% in Junior Class= 80-10=70%
A. The average class grade of the senior class is higher than that of the junior class Incorrect because the average cannot be inferred from the given information
B. The number of students with grades above 80 percent is greater in the junior class than in the senior class Incorrect because the total number of students in senior class and junior class are not known, therefore, this cannot be inferred.
C. The number of students with grades lower than 80 percent is greater in the senior class than in the junior class Incorrect because the total number of students in senior class and junior class are not known, therefore, this cannot be inferred.
D. Some students in the junior class have grades between 80 percent and 90 percent. Correct
E. The number of students with grades above 90 percent is higher in the senior class than in the junior class Incorrect because the total number of students in senior class and junior class are not known, therefore, this cannot be inferred.
