A) 5
B) 45
C) 50
D) 30
Correct Answer: C
Solution :
Number of children \[=2x,\]\[3x\]and \[5x,\] then \[(2x+10):(3x+10):(5x+10)\] = 4 : 5 : 7 \[\therefore \]\[5\,\,(2x+10)=4\,\,(3x+10)\] \[\Rightarrow \] \[x=5\] Hence, total number of children before increase \[=10x=10\times 5=50\]You need to login to perform this action.
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