A) 15
B) 17
C) 18
D) 20
Correct Answer: A
Solution :
[a] Let number of girls student be x Sum of marks \[=25\times 40+x\times 48\] Total students \[=25+x.\] \[\therefore 43=\frac{25.40+x.48}{x+25}\] \[\Rightarrow 43x+43.25=25.40+x.48\] \[\Rightarrow 5x=3.25\Rightarrow x=15\]You need to login to perform this action.
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