• # question_answer The mean of marks secured by 60 students in division A of class X is 64, 40 students of division B is 60 and that of 60 students of division C is 58. Find the mean of marks of the students of three divisions of Class X. A)  $60.05$            B)  $59.35$          C)         $62.15$            D)         $60.75$

Mean of marks of the students $=\frac{(60\times 64+40\times 60+60\times 58)}{160}$ $=\frac{9720}{160}=60.75$