Homework SourseTwo classes of students took the same exam and received diff
Two classes of students took the same exam and received different average scores. x represents the sample means and n the sample sizes. Using the method of weighted means find the average score for all the students in both classes.
| Class | A | B |
| x | 89 | 78 |
| n | 30 | 40 |
Solution
CLASS A MEAN IS 89
TOTAL STUDENTS = 30
HENCE TOTAL SUM WILL BE 89*30 = 2670
CLASS B MEAN IS 78
TOTAL STUDENT IS 40
TOTAL SUM IS 78*40 = (3120+2670)/((30+40) = 5790/70=82.71
HENCE FOR AVERAGE 3120+
