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The average of 7 numbers is 64. The average changes to 60 when two nu
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07 Oct 2024, 00:21
07 Oct 2024, 00:21
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The average of 7 numbers is 64. The average changes to 60 when two numbers are removed. What is the average of the two numbers removed?
A. 37
B. 66
C. 74
D. 132
E. 148
A. 37
B. 66
C. 74
D. 132
E. 148
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Re: The average of 7 numbers is 64. The average changes to 60 when two nu
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07 Oct 2024, 01:50
07 Oct 2024, 01:50
1
Let the sum of all 7 numbers be 7×64=448
When two numbers are removed, the average of the remaining 5 numbers is 60. So, the sum of the remaining 5 numbers is 5×60=300
The sum of the two numbers removed is 448−300=148
Thus, the average of the two numbers removed is 148/2=74
Hence, C
When two numbers are removed, the average of the remaining 5 numbers is 60. So, the sum of the remaining 5 numbers is 5×60=300
The sum of the two numbers removed is 448−300=148
Thus, the average of the two numbers removed is 148/2=74
Hence, C
gmatclubot
Re: The average of 7 numbers is 64. The average changes to 60 when two nu [#permalink]
07 Oct 2024, 01:50
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