Question

Events A and B are mutually exclusive.
Also, P(A) = 0.15 and P(B) = 0.2. Medal

What is P(A or B)?

A.
0.05

B.
0.03

C.
0.20

D.
0.35

Answer 1

@Phebe

Answer 2

@JoannaBlackwelder

Answer 3

For mutually exclusive events, their intersection or AND is 0.. ie:
\[P(A \; and \; B) = 0\]

Answer 4

So as you know:
\[P(A \; or \; B) = P(A) + P(B) - P(A \; and \; B)\]

Answer 5

As last term is 0 for Mutually Exclusive events, as nothing is common in them..
So, you left with only first two terms here..

Answer 6

http://openstudy.com/study#/updates/5564a093e4b0423951d68ce9

Answer 7

\[P(A \; or \; B) = P(A) + P(B)\]

You have now all the things, just use it to find answer...

Answer 8

0.35 @eta

Answer 9

Absolutely...

Answer 10

\(\dagger\)