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If Sierra’s scores on her first three tests were 90, 93, and
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20 Mar 2020, 11:28
20 Mar 2020, 11:28
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Question Stats:
95% (00:35) correct
4% (01:00) wrong based on 21 sessions
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If Sierra’s scores on her first three tests were 90, 93, and 98, what must she score on the fourth test to have 95 as her test average?
A. 95
B. 96
C. 97
D. 98
E. 99
Kudos for the right answer and explanation
A. 95
B. 96
C. 97
D. 98
E. 99
Kudos for the right answer and explanation
Re: If Sierra’s scores on her first three tests were 90, 93, and
[#permalink]
20 Mar 2020, 20:55
20 Mar 2020, 20:55
1
\( Average = \frac{Sum of observations}{no. of observations}\)
Let the fourth test have a score of X.
\(95 = \frac{90+93+98+X}{4}\)
\(95 \times 4 = 281 + X\)
\(380 - 281 = X\)
\(X = 99\)
OA,E
Let the fourth test have a score of X.
\(95 = \frac{90+93+98+X}{4}\)
\(95 \times 4 = 281 + X\)
\(380 - 281 = X\)
\(X = 99\)
OA,E
Carcass wrote:
If Sierra’s scores on her first three tests were 90, 93, and 98, what must she score on the fourth test to have 95 as her test average?
A. 95
B. 96
C. 97
D. 98
E. 99
Kudos for the right answer and explanation
A. 95
B. 96
C. 97
D. 98
E. 99
Kudos for the right answer and explanation
gmatclubot
Re: If Sierra’s scores on her first three tests were 90, 93, and [#permalink]
20 Mar 2020, 20:55
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