An sss1 contains three classes of 36,33 and 31 students. In an examination, tha average marks of the class were 65, 56and 52 respectively. What was the average mark for sss1 altogether
To find the average mark for the whole SSS1 class, we need to calculate the total marks obtained by all the students in each class and then divide that total by the total number of students in SSS1.
Class 1:
Total marks = 36 * 65 = 2340
Class 2:
Total marks = 33 * 56 = 1848
Class 3:
Total marks = 31 * 52 = 1612
Now, add up all the total marks:
2340 + 1848 + 1612 = 5800
Total number of students in SSS1 = 36 + 33 + 31 = 100
Average mark for SSS1 = Total marks / Total number of students
= 5800 / 100
= 58
Therefore, the average mark for SSS1 altogether is 58.