A) 10
B) 20
C) 30
D) 35
Correct Answer: B
Solution :
Let the original strength of class \[=x\] New average \[=\frac{x\,\,\,\,\,\,\,25+5\,\,\,\,\,\,20}{x+5}=24\] \[24(x+5)=25x+100\] \[24x+120=25x+100\] \[x=20\]You need to login to perform this action.
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