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AMC 8
1988 AMC 8
21
1988 AJHSME #21
1988 AJHSME #21
Source:
June 21, 2011
Problem Statement
A fifth number,
n
n
n
, is added to the set
{
3
,
6
,
9
,
10
}
\{ 3,6,9,10\}
{
3
,
6
,
9
,
10
}
to make the mean of the set of five numbers equal to its median. The number of possible values of
n
n
n
is
(A)
1
(B)
2
(C)
3
(D)
4
(E) more than
4
\text{(A)}\ 1\qquad\text{(B)}\ 2\qquad\text{(C)}\ 3\qquad\text{(D)}\ 4\qquad\text{(E)}\ \text{more than }4
(A)
1
(B)
2
(C)
3
(D)
4
(E)
more than
4
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