Given line JM is the segment bisector- I’m really confused it’s for a test

Acomposition of transformations maps δxyz to δx"y"z". the first transformation for this composition is , and the second transformation is a 90° rotation about point x'.

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2