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A school has 4 sections of Chemistry in Class X having 40,35,45 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.(a) 50.25 (b) 51.25 (c) 52.25 (d) 53.25

A school has 4 section of Chemistry in Class X having 40, 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

A school has four sections in Class XII having 50, 39, 42, 48 students of the four section. In a mathematics test the average marks were 60, 55, 57 and 48 respectively. What was the overall average of the marks per student?

Students of three sections of a class, having 30, 30 and 40 students appeared for a test of 100 marks. The arithmetic means of the marks of the three sections are 72.2, 69.0 and 64.1 in that order. What is the arithmetic mean of the marks of all the students of the three sections?

A school has only four classes that contain 10,20,30 and 40 students respectively. The pass percentage of these classes are 20%, 30%, 60% and 100% respectively. Find the pass % of the entire school.

A class has five sections that have 25,30,40, 45,and 60 students ,respectively.The pass percentahe of these sections are 20%,30%,35%,40%and100% ,respectively .The pass percentahe of the entire class is :

The class X of a Vidhyalaya has four sections: A, B, C and D. The average weight of the students of A, B, C together and A, C, D together are 45 kg and 55 kg respectively, while the average weight of the students of A, B, D together and B, C, D together are 50kg and 60kg respectively. Which of the following could be the average weight of the students of all the four sections together?

60 students of Section A of Class XI, obtained 40 mean marks in Statistics, 40 students of Section B obtained 35 mean marks in Statistics. Find out mean marks in Statistics for Class XI as a whole.