a class of 40 students has an avarage pof 56 marks in maths exam.but layer on it was found that terms 48,54and 67 were misread as 68,45amd 87.find correct mean
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Answered by
10
Answer:
no. of observations =40
sum of observations =(56×40)+48+54+67+68+45+87
mean= sum of observations/no of observations
=2273/40
=56.825
Answered by
3
Step-by-step explanation:
misread = 48 + 54 + 67 + 68 + 45 + 87 / 6
= 369/6 = 61.5
56 + 61.5 = 117.5 Ans
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