Sachin Tendulkar has a certain average for 11 innings. In the 12th innings he scores 120 runs and thereby increases his average by 5 runs. His new average is :
A. 60
B. 62
C. 65
D. 66
Show Answer
Answer-C
Solution-
Solution(By Apex Team)
Let the average of ’11’ innings is = x
According to the question,
$\begin{array}{l}\left[\Large\frac{11x+120}{12}\right]=x+5\\
11x+120=12x+60\\
x=60\\
\text{∴ His new average}\\
\text{= 60 + 5}\\
\text{= 65}\end{array}$