Answer:
70.5
Explanation:
There are 28 students in Class A and 32 students in Class B
The mean score for all the students in both classes is 72.6
The mean score for the students in Class A is 75
To find the mean score for Class B:
Let x be the mean score for Class B
Total number of students = 28 + 32 = 60
Total score for all students = Mean * Number of students = 72.6 * 60 = 4356
Total score for Class A = Mean * Number of students
= 75 * 28 = 2100
So remaining total score for Class B = 4356 - 2100 = 2256
Number of students in Class B = 32
Mean score for Class B = Total score / Number of students = 2256 / 32 = 70.5
Therefore, the mean score for the students in Class B is 70.5.