Question

Here is the probability model for the blood type of a randomly chosen person in the United States.

Blood type O A B AB
Probability 0.53 0.21 0.03 0.23

What is the probability that a randomly chosen American does not have type O blood?
% Round to the nearest 0.01%

Answer 1

first add those up to see if they add to one
Yes, they do so everyone has one of those 4 types
THEREFORE
probability not O = 1 - probability of O
1 - .53 = 0.47

Answer 2

Thanks

Answer 3

Stop putting extra stuff in the Subject box. It's childish and not needed.

Answer 4

This is wrong