A cricketer has a certain average runs for 10 innings. In the 11th inning, he scores 100 runs, now his average is increased by 9 runs. Then average of 11 innings is:
Answer & explanation
Correct answer: option 1
Let the old average of the cricketer be x.
According to the question:
\(\frac{\text{10x + 100} }{11 }\) = x + 9
10x + 100 = 11x + 99
x = 1
The old average of the cricketer comes out to be 1. Thus, the new average = x + 9 = 1 + 9 = 10 runs.