The median marks of 50 students were 60 but later on it was found that the marks of a student who secured 75 we're wrongly taken as 65 what is the correct median
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Answer:
68.66
Explanation:
⇒ Average marks of 15 students are 70.
⇒ Total marks of 15 students =15×70=1050
⇒ It is given that one entry is wrong and 65 is written instead of 45
⇒ Then, correct total marks of 15 students =1050−65+45=1030
∴ Correct average =
15
1030
=68.66
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