Independent/Dependent Probability

Independent probability happens when the probability of the first event does not affect the probability of the second event.

• True

• False

A bag contains 5 striped cubes, 3 dotted cubes, 4 white cubes and 3 red cubes. What is the probability of drawing a red cube, replacing it, and then drawing a white cube?

• independent

• dependent

A bag contains 2 striped cubes, 3 dotted cubes, 4 white cubes and 3 red cubes. What is the probability of drawing a white cube, not replacing it, and then drawing a dotted cube?

• dependent

• independent

When the probability of the 2nd event is NOT altered by the 1st event then the events are ...

• Independent

• Dependent

• Coincidence

How many of these statements are true?
1) P(spanish) = 25/50 
2) P(spanish given boy) = 10/20
3) P(boy given spanish) = 10/20
4) {spanish} and {boy} are independent. 

• 1

• 2

• 3

• 4

if the outcome of one event has no effect on the outcome of a second event, then the two events are called ____.

• Probability

• Independent Events

• Dependent events

• Conditional probability

There are six nickels and seven dimes in your pocket. You randomly pick a coin out of your pocket and then return it to your pocket. Then you randomly pick another coin. What is the probability that both times the coin is a nickel?

• 6/13

• 2/7

• 5/16

• 3/19

• 36/169

A marble bag contains 3 red marbles, 4 gray marbles, 6 white marbles, and 5 black marbles. What is the probability of randomly drawing a red marble and then a gray marble if the first marble is replaced?

• 1/9

• 1/27

• 1/6

• 2/9

Marietta picks a candle from the bunch, replaces it, and then selects one again. What are the chances that she selects a green both times?

• 1/144

• 1/12

• 1/36

• 2/24

• 2/12

What is the probability that Tom will get a lollipop, replace it, then draw a gumball? The treat bag containing 6 lollipops and 4 gum balls

• 1/24

• 1/90

• 6/25

• 1/10