A) 20
B) 10
C) 30
D) 5
Correct Answer: B
Solution :
\[\text{Mean}=\frac{(0\times a)+(1\times 4)+(2\times 3)+(3\times 2)+(4\times 1)}{a+4+3+2+1}\] \[1=\frac{4+6+6+4}{a+10}\] \[\Rightarrow \] \[a+10=20\] \[\Rightarrow \] \[a=10\]You need to login to perform this action.
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