Problem based on Addition theorem on probability.
The distribution of blood types for 100 Americans is listed in the table. If one donor is selected at random, find the probability of selecting a person with blood type A+ or A-.
|
Blood Type
|
O+
|
O-
|
A+
|
A-
|
B+
|
B-
|
AB+
|
AB-
|
|
Number
|
37
|
6
|
34
|
6
|
10
|
2
|
4
|
1
|