A school has 4 section of Chemistry in Class X having 60, 35, 45 and 42 students. The mean marks obtained in Chemistry test are 50, 60, 55 and 45 respectively for the 4 sections. Determine the overall average of marks per student. Choose the correct option
A) 50
B) 52
C) 51
D) 53
E) None of the above
Required average marks   = 60Ã—50+35Ã—60+45Ã—55+42Ã—45/60+35+45+42   = 3000+2100+2475+1890/182   = 9465â„182 = 52   Answer 52
<result>B</result>
A school has 4 section of Chemistry in Class X having 60, 35, 45 and 42 students. The mean marks obtained in Chemistry test are 50, 60, 55 and 45 respectively for the 4 sections. Determine the overall average of marks per student.