Respuesta :

abigelabate9

Answer:

85

Step-by-step explanation:

the mean is equal to=99+66+90=255

255÷3=85

aeil4655

Answer:

Anna's test average would be 85%.

Step-by-step explanation:

To find the average, you have to do 66 + 90 + 99 to get an answer of 255. The next thing you do is divide 255 by 3 to get a final answer of 85%. :) I hope this helps! ^^