Respuesta :

lsch2504
  • Answer:

     9 T-Shirts

  1. Step-by-step explanation:
  1. There are 30 t shirts. 20% of the t shirts were blue and 1/2 of the t shirts were black.
  2. 20% is equivalent/ the same as 20/100 and simplified, 1/5. 1/2 black + 1/5 blue  = 70/100 black and blue.
  3. This leaves 30/100(30%) remaining t shirts (neither black or blue). This leaves us to find 30% of 30 (shirts). 30% of 30 equals 9. 30/100 = 9/30.