The average of runs of a cricket player of 10 innings was 32 How many runs must he make in his next ......

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4 ?

Average = total runs / no.of innings = 32 
So, total = Average x no.of innings = 32 x 10 = 320.
Now increase in avg = 4runs. So, new avg = 32+4 = 36runs 
Total runs = new avg x new no. of innings = 36 x 11 = 396 
Runs made in the 11th inning = 396 - 320 = 76

By: MIRZA SADDAM HUSSAIN