1. The mean of marks secured by 65 students in division A of class X is 54, 30 students of division B is 50 and that of 55 students of division C is 48. Find the mean of marks of the students of three divisions of Class X.
Write Comment
Comments
By: anil on 05 May 2019 02.10 am
Total marks secured by 65 students in division A = 65 $$ imes$$ 54 = 3510 Total marks secured by 30 students in division B = 30 $$ imes$$ 50 = 1500 Total marks secured by 55 students in division C = 55 $$ imes$$ 48 = 2640 => Mean of marks of the students of three divisions of Class X = $$frac{(3510 + 1500 + 2640)}{(65 + 30 + 55)}$$ = $$frac{7650}{150} = 51$$ => Ans - (C)
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use