A) 73
B) 65
C) 68
D) 74
Correct Answer: B
Solution :
Since, total number of students = 100 and 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 = \[70\times 75=5250\] 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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