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.
please tell with full explanation
i don't know anything about this sum
but i know about what is mean
please tell with full explanation
i don't know anything about this sum
but i know about what is mean
Answers & Comments
Verified answer
Answer:
39.70
Step-by-step explanation:
Mean score of students =40
∴Total score = 100×40= 4000 100
[∵ mean
= Sum of the score of all students (Total score)
_____________________
Number of students
Difference in one score by mistake = 83-53=30
Actual total scores = 4000-30=3970
Actual mean
Actual total scores 3970
________________ = ______ = 39.70
Number of students 100
please mark me as brainliest.