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20 Jul 2020, 04:04
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A
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The mean of nine numbers is 85. If 5 is subtracted from each of six of the numbers, what is the new mean?
A. 81 2/3
B. 82.50
C. 83.50
D. 83 2/3
E. 84.07
A. 81 2/3
B. 82.50
C. 83.50
D. 83 2/3
E. 84.07
20 Jul 2020, 04:20
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Bunuel
Actual average : 85
Subtracted average : (5*6)/9 = 3 1/3
New Average = 81 2/3
OA: A
20 Jul 2020, 17:45
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Mean = Sum of Observations / Total Observations
The mean of 9 numbers = 85
Sum of the 9 numbers = 9 * 85 = 765
If 5 is subtracted from 6 numbers, then total value subtracted = 6 * 5 = 30
Sum of the 9 numbers = 765 - 30 = 735
Mean = \(\frac{735 }{ 9} \)= \(\frac{245}{3} \)= 81 \(\frac{2}{3}\)
Option A
Arun Kumar
The mean of 9 numbers = 85
Sum of the 9 numbers = 9 * 85 = 765
If 5 is subtracted from 6 numbers, then total value subtracted = 6 * 5 = 30
Sum of the 9 numbers = 765 - 30 = 735
Mean = \(\frac{735 }{ 9} \)= \(\frac{245}{3} \)= 81 \(\frac{2}{3}\)
Option A
Arun Kumar
