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

When the probability of the 2nd event is NOT 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

Is the event INDEPENDENT or DEPENDENT?
You have a jar with 24 pieces of chocolate candy and 14 pieces of orange candy.  We take one piece of candy at random from the jar, put it back, and then take a second piece of candy at random from the jar.

• Independent
• Dependent

Basic probability review:

A bag contains 3 red marbles, 8 blue marbles, 7 yellow marbles and 2 orange marbles. What is P(yellow) as a percent?

• 70%

• 35%

• 10%

• 25%

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

A bag contains 3 red marbles, 8 blue marbles, 7 yellow marbles and 2 orange marbles. One marble is selected, NOT replaced and a second marble is selected. What is the P(blue, then red)?

• 3/19

• 2/5

• 3/50

• 6/95

There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2 marbles one after the other without replacement, then what is the probability that both are red in color? P(R,R)

• 2/5

• 1/21

• 5/35

• 1/7

There are 2 violet balls and 4 pink balls in a bag. If two balls are drawn one after the other, then what is the probability of getting violet first and pink next, if the first ball drawn is replaced? P(V,P)

• 1/3

• 2/9

• 1/6

• 1/4