In a school 90 boys and 30 girls appeared for a public examination. The mean marks of boys was found to be 45% whereas the mean marks of girls was 70%. What is the average marks % of the school?

In a school 90 boys and 30 girls appeared for a public examination. Th

1.	In a school 90 boys and 30 girls appeared for a public examination. The mean marks of boys was found to be 45% whereas the mean marks of girls was 70%. What is the average marks % of the school?
A.	0.615
B.	0.5125
C.	0.405
D.	0.5152
Answer» C. 0.405

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In a school 90 boys and 30 girls appeared for a public examination. The mean marks of boys was found to be 45% whereas the mean marks of girls was 70%. What is the average marks % of the school?

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