Independent and Dependent Probability Review

When the probability of the 2nd event is altered by the 1st event then the events are ...

• Independent

• Dependent

• Coincidence

A bag contains some red-colored and some blue-colored marbles. First a red-colored marble is drawn and then, without replacing the first marble, a blue-colored marble is drawn. Are the two events dependent or independent?

• Independent

• Dependent

A bag contains 3 red marbles, 8 blue marbles, 7 yellow marbles and 2 orange marbles. One marble is selected, put back in the bag and a second marble is selected. Is the event Independent or Dependent?

• Independent

• Dependent

A bag contains 3 red marbles, 8 blue marbles, 7 yellow marbles and 2 orange marbles. One marble is selected, put back in the bag and a second marble is selected. What is the P(red, then yellow)?

• 3/20

• 7/20

• 21/400

• 49/400

There are 5 red roses, 3 yellow roses, and 8 white roses in a tray. If Stephanie picked 2 roses one after the other without replacing, then what is the probability of picking a white rose first and a red rose next? P(W,R)

• 1/6

• 5/6

• 1/3

• 2/3

What is the probability of rolling an even number on the first roll of a number cube and rolling an odd number on the second roll?

• 1/4

• 1

• 1/8

• 1/2

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

A number cube is rolled and a coin is tossed. What is the probability of rolling a number greater than 4 and tossing tails?

• 1/6

• 1/3

• 1/2

• 1/4

In a standard deck of 52 cards, what is the probability of drawing one ace after another ace on two draws (no replacing)?

• 1/221

• 1/4

• 1/169

• 1/13

Given a standard deck of 52 playing cards, what is the probability of randomly drawing a 2 and then a 3 if the first card is not replaced?

• 1/13

• 4/663

• 1/676

• 1/169