A) 53.7
B) 54.4
C) 53
D) 55.8
Correct Answer: B
Solution :
\[\therefore \]Required mean of the marks \[=\frac{55\times 58+45\times 54+75\times 52}{55+45+75}\] \[=\frac{3190+2430+3900}{55+45+75}=\frac{9520}{175}=54.4\]You need to login to perform this action.
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