Answer:
P (Shirts that are not gray) =3/4
Step-by-step explanation:
We need to find the total number of shirts
Total = 9black shirts+ 6white shirts + 5gray shirts = 20 shirts
We need to find the shirts that are not gray
Shirts that are not gray= shirts that are black and shirts that are white
= 9+6 = 15
P (Shirts that are not gray) = shirts that are not gray/ total number of shirts
= 15/20
=3/4