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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  Statistics
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In a class of 100 students there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class is 72 then what is the average of the girls ?

$\begin {array} {1 1} (A)\;73 & \quad (B)\;65 \\ (C)\;68 & \quad (D)\;74 \end {array}$

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