Probability Dependent Events

In a box there are 3 red pens, 2 green pens, and 1 blue pen. What is the probability of picking a red pen, not replacing it, and then picking a blue pen?

• 1/2

• 4/11

• 1/10

• 2/3

A box contains all the letters of the word U N D E R S T A N D. What is the probability of selecting an 'N' first and a 'D' next, if the first letter is replaced?

• 3/50

• 1/25

• 1/10

• 2/5

There are 15 boys in a class with 14 girls. Find the probability of selecting a girl then a boy

• 15/58

• 18/33

• 2/29

• 1/29

Phoffman has 5 blue socks, 4 red socks and 3 green socks in his sock drawer. He wants to randomly pick 2 socks without replacement. P( blue and green)

• 8/132

• 5/44

• 5/132

• 15/144

All of the letters of the word GREENSKY are put in a bag. Mike Devol will grab 2 letters from the bag with replacement. P(E and Y)

• 3/32

• 1/64

• 1/28

• 1/32

Michael Bont has 4 banjos, 3 guitars, and 1 fiddle. Without looking, Bont will grab an instrument, set it aside, and grab another instrument. P(Banjo and Banjo)

• 1/4

• 12/56

• 3/14

• 16/64

Guido Batista has 5 Chicago Dogs, 3 slices of pizza, and 1 pretzel. He wants to grab 2 food items without replacing the first. P(Chicago Dog, and Pretzel)

• 5/81

• 5/72

• 1/64

• 15/72

Determine if the events are dependent or independent.

Rolling a 4 with one die and a 6 with another?

• Independent Events

• Dependent Events