0.69
Explanation
The probability of an event is the number of favorable outcomes divided by the total number of outcomes possible
Step 1
Let
probability of b O = 0.49 = 49%
probability of b A = 0.27 = 27%
probability of b B = 0.20 = 20%
probability of b AB = 0.04 = 4%
Step 2
Joe can safely receive blood transformations from
people with blood types O and B
it is 49%+20%=69%
then, favorable out come is 69
total number of out comes = 100
or
[tex]\frac{69}{100}=0.69[/tex]
