Question

mean of 200 items was 50 later on it was discovered that the two items were misread as 92 and 8 instead of 192 and 88.find the correct mean

Answer 1

As the mean of 200 items is 50. So,
Total items= 200*50 = 10000.
Now,
Difference of items due to misread
= (192-92 )+ (88-8) = 100 + 80 = 180.
Then, Add 180 to the total value
i.e. 10000+180 = 10180.
So, Correct mean= 10180/200 = 50.9

Answer 2

Answer:

HEY THE ANS IS 50.9

Step-by-step explanation:

so first no of items =200

mean(misread)=50

so total no of items=200*50=10000

then difference of the misread observations=

(192-92)+(88-8)=100+80=180

after that add 180 to the total value,

10000+180=10180

so correct mean=10180/200=50.9