The average of marks of a class of 40 students is 60. Later it was found that two marks were wrongly recorded as 50 and 60 instead of 85 and 65. Find the correct average.
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1
Answer:61
Step-by-step explanation:
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Step-by-step explanation:
Sum of the total marks , achieved by 40 students of a class = 40×60 = 2400 marks
After resolution ,
New sum of the total marks = 2400+35+5 = 2440 marks
Correct average = 2440/40 = 244/4 = 61
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