Quote:
Originally Posted by mohsy
a cricketer has certain average for 9 innings. in the tenth inning, he scores 100 runs,thereby increasing his average by 8 runs. his new average is: ??  |
Suppose his average for
9 innings is
X
After 10th inning his average becomes = x + 8
Formula for the calculation of average = Sum of All the items / Total Number of the items
We have effectively two items in this senario
1: 9 innings of X value
2: 10th inning of 100
Put these values in the above formula:
(X + 100)/2 = X+8
Solve this for X
you will arrive at
X = 84, you know X is the average of first nine innings.
Hence his new average after 10th inning will be = 84+8=
92
OR
=(X + 100) /2
= (84+100)/2
=92 Ans.