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A student has taken ten tests, with an average score of 87.
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18 Jul 2022, 00:35
18 Jul 2022, 00:35
Expert Reply
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Question Stats:
85% (01:05) correct
14% (02:13) wrong based on 7 sessions
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A student has taken ten tests, with an average score of 87. There are three tests remaining in the term. If her final testing average is 90 or more, she will get an A for the class. The maximum score on the tests is 100. What must her average on the last three tests be to achieve an A in the class?
A 87
B 90
C 96
D 100
E 110
A 87
B 90
C 96
D 100
E 110
Part of the project: GRE QCQ & PS 3 Questions Every One DAILY Challenge - (2022)
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GRE Math Essentials (2022)
GRE Geometry Formulas for a Q170
GRE - Math Book
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GRE Math Essentials (2022)
GRE Geometry Formulas for a Q170
GRE - Math Book
GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2506
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Re: A student has taken ten tests, with an average score of 87.
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20 Jul 2022, 06:33
20 Jul 2022, 06:33
1
Expert Reply
Test taken = 10
Average = 87
Marks = 10*87 = 870
Average required in 13 tests = 90 or more
Minimum marks required in 13 tests to get an A = 90*13 = 1170
remaining tests = 3
remaining marks to get an A = 1170 - 879 = 300
Hence the student needs 100 marks out of 100 in each remaining test to get an A.
Answer: D
Average = 87
Marks = 10*87 = 870
Average required in 13 tests = 90 or more
Minimum marks required in 13 tests to get an A = 90*13 = 1170
remaining tests = 3
remaining marks to get an A = 1170 - 879 = 300
Hence the student needs 100 marks out of 100 in each remaining test to get an A.
Answer: D
gmatclubot
Re: A student has taken ten tests, with an average score of 87. [#permalink]
20 Jul 2022, 06:33
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