The average runs scored by a batsman in 20 matches is 40. In the next 10 matches the batsman scored an average of 20 runs. Find his average in all the 30 matches?	Pick one:
A) 31
B) 46
C) 88
D) 33.33
E) 12
Total score of the batsman in 20 matches = 800.   Total score of the batsman in the next 10 matches = 200.   Total score of the batsman in the 30 matches = 1000.   Average score of the batsman = 1000/30 = 33.33   Answer:33.33
<result>D</result>
The average runs scored by a batsman in 20 matches is 40. In the next 10 matches the batsman scored an average of 20 runs. Find his average in all the 30 matches?