The average of runs of a cricket player of 10 innings was 37. How many runs must he make in his next innings so as to increase his average of runs by 4 ?	Select.
A) 76 B) 81 C) 85 D) 87 E) 89
Explanation:   Average = total runs / no.of innings = 37   So, total = Average x no.of innings = 37 x 10 = 370.   Now increase in avg = 4runs. So, new avg = 37+4= 
<gadget id="calculator">37+4</gadget>
<output>41</output>
41runs   Total runs= new avg x new no. of innings = 41 x 11 = 451   Runs made in the 11th inning = 451 - 370= 
<gadget id="calculator">451 - 370</gadget>
<output>81</output>
81 Answer: 81
<result>B</result>
The average of runs of a cricket player of 10 innings was 37. How many runs must he make in his next innings so as to increase his average of runs by 4 ?