The mean of the marks scored by 50 students was found to be 39. later on it was discovered that a score of 43 was misread as 23 . Find the correct mean . Rs aggarwal
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Answer:
The answer will be 39.4
Step-by-step explanation:
Given,
No. of students = 50
Mean marks secured by them = 39
Incorrect sum of marks secured = 39 × 50 = 1950.
Correct sum = incorrect sum – (incorrect marks) + correct marks
= 1950 – 23 + 43 = 1970
Correct mean = 39.4.
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