Ind/Dep Probability

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

Dependent probability happens when the first item is not replaced, causing the total outcomes to decrease by 1.

• true

• false

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

• True

• False

A pocket contains 3 pennies, 2 nickels, 1 quarter and 4 dimes. What is the probability of randomly choosing a dime, replacing it, and then drawing a penny?

• independent

• dependent

Clinton has a bag of Skittles™. Inside the bag are 6 red, 4 orange, 7 yellow, 3 purple and 4 green Skittles™. What is the probability of drawing a green Skittle™, replacing it, and then drawing another green Skittle™?

• independent

• dependent

Pablo chooses a colored marble from a mixed bag and writes down the color. Pablo leaves it out and then draws another.

• Independent
• Dependent

Christopher picks a marble at random. Without putting the first marble back, he picks a second marble at random.

• Independent 
• Dependent

Which event is not a dependent event?

• Picking 2 students to each be line leader and door holder from a group of 20 students
• Picking 2 marbles from a bag without replacing the first marble
• Picking 2 crayons from a box at the same time (simultaneously) 
• Picking an earring, replacing it, then picking a 2nd earring

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 'vowel' first and a 'vowel' next, if the first letter is not replaced?

• 6/20

• 1/15

• 9/100

• 2/5