Question

the mean of 50 observation was found to be 25, if two observation were wrongly taken as 45 and 18 instead of 54 amd 8 find the corect mean​

Answer 1

Answer:

Hey there, here is the solution.

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STEP 1: Find the total of the 5 observations:

Mean of the 5 observations = 7

Sum of the 5 observations = 5 x 7 = 35

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STEP 2: Take away the 2 observations that are wrong:

Sum of the 3 right observations = 35 - 4 - 8 = 23

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STEP 3: Add back the 2 observations that are correct:

Sum of the 5 observations = 23 + 5 + 9 = 37

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Find the mean of the 5 observations:

37 ÷ 5 = 7.4

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Answer: The correct mean is 7.4

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Answer 2

Hi,This is your Answer Happy Learning.