A) \[50%\]
B) \[51.4%\]approx
C) \[54.6%\]approx
D) 45%
Correct Answer: B
Solution :
There were 100 students. \[\therefore \] \[20\times 80+25\times 31+55\times x=52\times 100\] \[\Rightarrow \] \[1600+775+55x=5200\] \[\Rightarrow \] \[55x=5200-2375=2825\] \[\Rightarrow \] \[x=\frac{2825}{55}=51.4\] (approx.)You need to login to perform this action.
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