Question

Find the mean of x, x + 2, x + 4, x + 6, x + 88. The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

Answer 1

Answer:

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Answer 2

Answer:

39.7

Step-by-step explanation:

Mean score = 40

mean=sum of observation /no of observations

sum of observations = mean * no of observations

that is 40 x 100

= 4000

after replacement, sum of new observation=4000-83+53

=3970

mean of new observation = 3970/100

=39.7

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