A batsman hits a score of 78 runs in the 16th inning and thus increases his average by 4. Find his average after 16th inning. Select
A) 13
B) 18
C) 27
D) 39
E) 40
Explanation :   Let the average after 16th inning = x.   Average after 15th inning =(x-4).   =&gt; 15(x-4)+78 = 16x   =&gt; x = 18.   Answer : 18
<result>B</result>
A batsman hits a score of 78 runs in the 16th inning and thus increases his average by 4. Find his average after 16th inning.