OpenStudy (anonymous):

The sum of the heights of alll students in a class is 1472in. The mean height is 5ft 4in. How many students are in the class?

OpenStudy (anonymous):

The arithmetic mean would be the sum of the heights divided by the number of students. Since we're given the mean and the sum of heights, divide by the sum of heights by the mean to yield the number of students.

OpenStudy (anonymous):

first convert the mean hieght to inches. then divide the number into the total hieght.

OpenStudy (anonymous):

total hieght=1472 5f 4in = 64in. divide this and you will get 23 people.

OpenStudy (anonymous):

ok so i got 23 students. The median height is 5ft 2in. How many students are 5ft. 2in. or taller?

OpenStudy (anonymous):

okay yeah im stuck on this one.

OpenStudy (anonymous):

@r.prioreschi the median is defined such that it lies in the exact middle. Since we have 23 students, the middle height would be that of which 11 are shorter and 11 are taller.

OpenStudy (anonymous):

(1,2,3,4,5,6,7,8,9,10,11) 12 (13,1415,16,17,18,19,20,21,22,23) putting it that way will say that 12, or 5f 2in is the middle hieght so there is an even amount of shorter and of taller people