a] The average of 30 results is 20 and the average of other 20 results is 30. What is the average of all the results?
a] 24 b] 48 c] 25 d] 50
Total numbers for in average of 30 results = 30*20 = 600
Total numbers for in average of 20 results = 20*30 = 600
Total numbers = 30+20
average of all the results = 600+600 /500 = 24
a] 24 b] 48 c] 25 d] 50
Total numbers for in average of 30 results = 30*20 = 600
Total numbers for in average of 20 results = 20*30 = 600
Total numbers = 30+20
average of all the results = 600+600 /500 = 24
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