A) 45%
B) 50%
C) 51.4% (approx.)
D) 54.6% (approx.)
Correct Answer: C
Solution :
Let mean score of remaining 55% = x \[\,\,\,\,\,\,\,\,\,\,\,\,\,\,52=\frac{20\times 80+25\times 31+55\times x}{100}\] \[\Rightarrow \]\[5200=1600+775+55x\] \[\Rightarrow \]\[55x=5200-1600-775=2825\] \[\therefore \]\[x=\frac{2825}{55}=51.36=51.4%\](approx.)You need to login to perform this action.
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