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20 Nov 2018, 09:12
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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:
5%
(low)
Question Stats:
88% (00:23) correct
12%
(00:34)
wrong
based on 641
sessions
History
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What was Bill's average (arithmetic mean) grade for all of his courses?
(1) His grade in social studies was 75, and his grade in science was 75.
(2) His grade in mathematics was 95.
(1) His grade in social studies was 75, and his grade in science was 75.
(2) His grade in mathematics was 95.
20 Nov 2018, 09:38
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As currently written, the answer is E.
We have no way of knowing how many courses Bill takes - if there are others besides social studies, mathematics and science, we have no data on them.
We have no way of knowing how many courses Bill takes - if there are others besides social studies, mathematics and science, we have no data on them.
21 Nov 2018, 00:49
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Quote:
What was Bill's average (arithmetic mean) grade for all of his courses?
(1) His grade in social studies was 75, and his grade in science was 75.
(2) His grade in mathematics was 95.
Mean = Sum of all courses(S)/ total number of courses(N)
we don't have any information about Total number of courses, So (E).
