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The average of 50 results was calculated as 30 but later it was found that while calculating, 73 was taken as 33 by mistake, then what will be the correct average?
Average of 50 results = 30
=> Sum of 50 results = $$30\times50=1500$$
After correcting the mistake new sum = $$1500-33+73=1540$$
=> Correct average = $$\frac{1540}{50}=30.8$$
=> Ans - (B)
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