SOLUTION: If A and B as shown below are two mutually exclusive events, what P(A or B)? P(A)= 1/4 P(B)= 1/5 A) 2/9 B) 3/20 C) 1/20 D) 9/20

Algebra ->  Probability-and-statistics -> SOLUTION: If A and B as shown below are two mutually exclusive events, what P(A or B)? P(A)= 1/4 P(B)= 1/5 A) 2/9 B) 3/20 C) 1/20 D) 9/20      Log On


   

Question 1082267: If A and B as shown below are two mutually exclusive events, what P(A or B)?
P(A)= 1/4 P(B)= 1/5
A) 2/9
B) 3/20
C) 1/20
D) 9/20
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
To get OR, add the probabilities
+P%28A%29+%2B+P%28B%29++=+1%2F4+%2B+1%2F5+
+1%2F4+%2B+1%2F5+=+5%2F20+%2B+4%2F20+
+1%2F4+%2B+1%2F5+=+9%2F20+
Answer is (D)