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04 Apr 2024, 01:30
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
86% (01:18) correct
14%
(01:25)
wrong
based on 71
sessions
History
Date
Time
Result
Not Attempted Yet
On a given day, 50 students in a certain class took a math test. Some of the students took the test on test paper A, and the remaining of the 50 students took the test on test paper B. What is the average score on the test for the 50 students?
(1) The average score for the students who take the test A was 75.
(2) The average score for the students who take the test В was 77.
(1) The average score for the students who take the test A was 75.
(2) The average score for the students who take the test В was 77.
04 Apr 2024, 02:51
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The average will be (sum of scores on test A + sum of scores on test B)/50
(1) The average score for the students who take the test A was 75.
This statement provides no info on test B, nor any info regarding the split in the number of students between A and B.
INSUFFICIENT
(2) The average score for the students who take the test В was 77.
This statement provides no info on test A, nor any info regarding the split in the number of students between A and B.
INSUFFICIENT
(1+2)
Putting the two statements together we have the average of tests A and B. However, without any information regarding how the 50 students are split between test A and test B it is impossible to solve for the overall average of the 50 students.
Putting the info provided in both statements together into an equation just to prove it:
[(avg. A * number of students taking A)+(avg. B * number of students taking B)]/50
INSUFFICIENT
ANSWER E
(1) The average score for the students who take the test A was 75.
This statement provides no info on test B, nor any info regarding the split in the number of students between A and B.
INSUFFICIENT
(2) The average score for the students who take the test В was 77.
This statement provides no info on test A, nor any info regarding the split in the number of students between A and B.
INSUFFICIENT
(1+2)
Putting the two statements together we have the average of tests A and B. However, without any information regarding how the 50 students are split between test A and test B it is impossible to solve for the overall average of the 50 students.
Putting the info provided in both statements together into an equation just to prove it:
[(avg. A * number of students taking A)+(avg. B * number of students taking B)]/50
INSUFFICIENT
ANSWER E
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06 Apr 2024, 03:49
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On a given day, 50 students in a certain class took a math test. Some of the students took the test on test paper A, and the remaining of the 50 students took the test on test paper B. What is the average score on the test for the 50 students?
(1) The average score for the students who take the test A was 75.
(2) The average score for the students who take the test В was 77.
Question Stem Analysis
Total students took a math test = 50
No. of students took maths test on paper A = a
No. of students took maths test on paper B = b
We need to find the average score on the test for 50 students =(a*average score who take test A) + (b*average score who take test B)/a+b
Statement A Insufficient
Without much information about the no. of students who take the test on papers A & B the average score who take the test on paper is not sufficient.
Statement B Insufficient
Doesn't provide much information about the no. of students who take tests on papers A & B. Not Sufficient.
If we combine both statements we get the average score on the test for 50 students = (a*75)+(b*77)/50
Insufficient
Hence, Option E
(1) The average score for the students who take the test A was 75.
(2) The average score for the students who take the test В was 77.
Question Stem Analysis
Total students took a math test = 50
No. of students took maths test on paper A = a
No. of students took maths test on paper B = b
We need to find the average score on the test for 50 students =(a*average score who take test A) + (b*average score who take test B)/a+b
Statement A Insufficient
Without much information about the no. of students who take the test on papers A & B the average score who take the test on paper is not sufficient.
Statement B Insufficient
Doesn't provide much information about the no. of students who take tests on papers A & B. Not Sufficient.
If we combine both statements we get the average score on the test for 50 students = (a*75)+(b*77)/50
Insufficient
Hence, Option E
