A) 35
B) 30
C) 25
D) 20
Correct Answer: C
Solution :
Let \[{{x}_{1}},{{x}_{2}},{{x}_{3}}\,.........,{{x}_{n}}\] are 9 items. \[\Rightarrow \,\frac{{{x}_{1}}+{{x}_{2}}+{{x}_{3}}+\,.......{{x}_{9}}}{9}=15\] \[\sum\limits_{i=1}^{9}{{{x}_{i}}=135}\] If one more item \[{{x}_{10}}\] is added then \[\sum\limits_{i=1}^{9}{{{x}_{i}}=135+{{x}_{10}}}\] \[\therefore \] mean \[\bar{x}\,=\frac{135+{{x}_{0}}}{10}=16\] \[\Rightarrow \,{{x}_{0}}=160-135=25\]
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