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