The arithmetic mean of four integers was computed as 15. Later it was seen that the number 10 was wrongly taken to be 30. What will be the correct mean of the numbers?
Answers
Answered by
2
Answer:
Correct Mean = 10
Step-by-step explanation:
Mean = Sum of observations / No. of observations
=> 15 = Sum / 4
=> Sum = 60
Now, 10 was wrongly taken to be 30
∴ Sum -30 +10 will give us the correct sum.
So, 60 - 30 + 10 = 40
Therefore, Mean = 40/4
=> Mean = 10
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Answered by
2
Answer:
Corrmean:20
Step-by-step explanation:
Here, it is given that in the calculation of average 10 was wrongly taken to be 30. That means in the wrong average 10 is included while 30 (actual number) was to be added.
wrong sum of numbers= 15×4=60
correct sum = 60-10+30 =80
correct average = 80/4 = 20
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