A) 15
B) 20
C) 25
D) 10
Correct Answer: B
Solution :
If the number of correct sums be Rs. x, then. \[x\times 3-(30-x)\times 2=40\] \[\Rightarrow \] \[3x-60+2x=40\] \[\Rightarrow \] \[5x=60+40=100\] \[\Rightarrow \] \[x=20\]You need to login to perform this action.
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