Mutually Exclusive Events
Dependent vs. Independent Events
1
Name the only operation (+ - xx-:) that is used in mutually exclusive events?
Addition
1
A bag contains 5 red marbles and 3 blue marbles. You select a red marble then replace it. What is the probability of drawing a blue marble on the second selection?
P(blue marble) = 3/8
Independent Event
2
What is this symbol?
Union
Or
We add probabilities when we see this symbol
2
A bag contains 5 red marbles and 3 blue marbles. You select a red marble and place it on the table. What is the probability of drawing a blue marble on the second selection?
P(blue marble) = 3/7
Dependent Event
3
You have 18 fish in a fish tank. 8 are solid colored, 4 are spotted, and 6 are striped.
What is the toal probability that you select a solid fish or a striped fish?
P(solid OR striped) = 8/18 + 6/18 = 14/18
14/18 = 7/9
Mutually Exclusive Event
3
A coin is tossed 17 times. What is the probability of getting heads on the 15th toss?
P(heads) = 1/2
Independent Event
4
On a number wheel with numbers from 1-10, what's the probability of randomly selecting a odd number or a number less than 8?
P(odd OR <8) = 5/10 + 7/10 = 12/10
Non-Mutually Exclusive Event
4
When you leave this class, you make a right. When I leave this class, I also turn right.
What is the probability that I turn right even though you already turned right?
P(I turn right) = 1/2
Independent Event
5
You are driving and come to a 4 way stop. What is the probability that you turn right or left?
1/3+1/3=2/3
We can turn left, right, or go straight for a total of 3 options.
Mutually Exclusive
5
You take a blue ball from the jar. You take a pink ball from the jar. 
P(blue) = 1/5
P(pink) = 1/4
Dependent Event.