5) at a certain high school, there are three sports: baseball, basketball, and football. some athletes at this school play two of these three, but no athlete plays in all three. at this school, the ratio of (all baseball players) to (all basketball players) to (all football players) is 15: 12: 8. how many athletes at this school play baseball?

3y/ 7

Where y =  the total number of athletes

Step-by-step explanation:

Let the total number of athletes  = y

Let the number of all  baseball athletes = b

Let the number of all  basketball athletes = k

Let the number of all  football athletes  = f

The ratio  b: k : f is given by:

15 : 12 : 8

Total proportion = 15 + 12 + 8

                           =   35

The ratio of all baseball player = 15/ 35

                                                    = 3/7

Number of baseball player =  3/7  of y

                                            = 3y/7

The means the three- seventh ( close to half) of the total athletes play baseball ball.

i'm not sure i quite understand, could you provide more information?