Answer:
a. 16
b. 80
c. Blood type AB
Step-by-step explanation:
Given:
O = 45%
A = 40%
B = 11%
AB = 4%
Total number of donors = 145
a. No. of donors that had type B blood = 
Type B blood donors ≈ 16
b. No. of blood donors without blood type O = 
Those without blood type O ≈ 80
c. Find the number of people that had type AB:
Type AB =
≈ 6. This is less than 10 donors.
Therefore, blood type AB had less than 10 donors.
I think 3 because if u divide 207 by 69 you get 3
Answer:
30%
Step-by-step explanation:
the first solution -30% will be 45% and the second solution added by 30% will be 45%
They can line up 20 different ways