Respuesta :
Answer:
76%
Step-by-step explanation:
For the definition of mean we can write this equation
(75 + 86 + 83 + x)/4 = 80
(244 + x)/4 = 80
244 + x = 320
x =76 %
Answer:
76%
Step-by-step explanation:
For the definition of mean we can write this equation
(75 + 86 + 83 + x)/4 = 80
(244 + x)/4 = 80
244 + x = 320
x =76 %