if 11 consecutive integers are listed from least to most,what is the mean of the 11 digits?
a)Average of the 1st 9 is 7
b)Average of the last 9 is 9
[spoiler]OA : D[/spoiler]
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11 consecutive integers
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JeffB
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For A:sanjana wrote:if 11 consecutive integers are listed from least to most,what is the mean of the 11 digits?
a)Average of the 1st 9 is 7
b)Average of the last 9 is 9
[spoiler]OA : D[/spoiler]
Since we have consecutive integers x + (x+1) etc.
x + (x+1)....(x+8)= 7
You can solve for x (which is your first integer)...Suff
For B:
Same as a
start with (x+2)....(x+10) = 9
Solve for x again..Suff
