The mean number of students in a classroom at school a is 32.5 and there are 25 classrooms. the mean number of students at school b is 29.6 in 12 classrooms. at school c the mean in each class is 15.3 for 10 classrooms. what is the mean number of students per classroom for all the schools combined?

We have given three school there, School A, School B and School C.

We are going to use following formula.

Total number of student in a school = Mean of number of student × Number of classrooms.

School A

Mean of students in School A = 32.5.

Number of classroom in School A = 25.

Number of students in School A = Mean × number of classrooms = 32.5×25 = 812.5

School B

Mean of students in School B = 29.6.

Number of classroom in School B = 12.

Number of students in School B = Mean × number of classrooms = 29.6×12 = 355.2

School C

Mean of students in School C = 15.3.

Number of classroom in School C = 10.

Number of students in School C = Mean × number of classrooms = 15.3×10 = 153.

Total sum of number of classes in all schools = 25+12+10 = 47.

Total sum of all students in all schools = 812.5 +355.2 +153 = 1320.7 .

The mean number of students per classroom for all the schools combined =

= = 28.1

The mean number of students per classroom for all the schools combined= 28.1

2

step-by-step explanation: