A) 73
B) 65
C) 68
D) 74
Correct Answer: B
Solution :
Since the total number students = 100 and the number of boys = 70 \[\therefore \] Number of girls = (100 - 70) = 30 Now, the total marks of 100 students \[=100\times 72=7200\] And total marks of 70 boys \[=70\times 75\,=5250\] \[\Rightarrow \] Total marks of 30 girls \[=7200-\,5250\,=1950\] \[\therefore \] Average marks of 30 girls \[=\frac{1950}{30}=65\]You need to login to perform this action.
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