ادوا
The
average .
marke secured by
36 Students
52. But it was
discovered that an item 64 was misread as 46 what is the correct mean of marks
Answers
Answered by
0
Answer:
52.5
Step-by-step explanation:
Here ,The average marks secured by 36 students = 52
Difference of correct and incorrect marks = 64 – 46 = 18
∴ Correct mean = 52 +
18
36
Correct mean = 52.5
Second method to solve this question with the help of given formula :
Here, n = 36, m = 52 , a = 64, b = 46
New mean = m +
(a - b)
n
New mean = 52 +
(64 - 46)
36
New mean = 52 +
18
36
New mean = 52 +
1
= 52.5
2
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