the average of 20 numbers is 75 the number 86 was incorrectly read as 68 while calculating find the correct average?
Answers
Answered by
2
Step-by-step explanation:
20 numbers sum = 75
20
=> 20 numbers sum=75*20= 1500
Incorrect number=68
Correct number=86
so New sum=
1500-68+86=1518
n
So new mean= Sum of numbers
20
= 1518
20
=75.5
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Answered by
4
Answer:
The new average is 75.9
Step-by-step explanation:
The average of 20 numbers is found to be 75
Now, it is found that 86 was incorrectly read as 68.
So, the total of the 20 numbers=(75×20)
=1500
Now, the new total would be
=((1500-68)+86)
=(1432+86)
=1518
So, the new average is=(1518/20)
=75.9
Hence, the new average is 75.9.
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