Simple vs Compound Probability

To find the probability of a simple event, you should write a ratio comparing the favorable outcomes to the total amount of outcomes. Which fraction below represents this ratio.

Mrs. Jameson placed the names of her five children into a hat. She is going to randomly draw the names to determine which child does which chore. What is the theoretical probability that she will draw the name Alex when drawing the first name?

• 1/4

• 1/3

• 1/2

• 1/5

Based on the chart, what is the experimental probability of pulling a green marble?

• 1/8

• 8/25

• 8/100

• 7/8

A bag of marbles contains 6 red, 5 blue, 3 green, and 4 yellow marbles. Theoretically, if you draw a marble and place it back in the bag 20 times, how many times should you get a blue marble?

• 4.5

• 5.6

• 6.6

• 10

How do you find compound probability?

• multiply the probability of each event that is occurring

• add the probability of each event that is occurring

• divide the probability of each event that is occurring

• Subtract the probability of each event that is occurring

Clara picks a marble at random, puts it back, and then picks another marble at

• dependent

• independent

Victor picks a card at random. Without putting the first card back, he picks a second card at random.

• dependent

• independent

John keeps his change in a jar. The jar contains 4 quarters, 18 dimes, 10 nickels, and 8 pennies. If he chooses a coin at random, does not replace it, then chooses another, what is the probability that he will choose a silver coin first, then a penny?

• 32/195

• 18/195

• 0

• 1/25

A bag of marbles contains 8 green, 4 blue, 10 red and 2 yellow colored marbles. A marble is drawn randomly, then replaced, and another is drawn.

Find P(red, then yellow)

• 5/138

• 5/288

• 5/144

• 5/12

A game requires players to roll a standard six sided die to determine the number of spaces to move. What is the probability of rolling an even number three times in a row?

• 1/2

• 1/4

• 1/6

• 1/8