Making Predictions Based on Probability

Olivia is conducting an experiment using a bag of marbles.  She reaches into the bag, draws a marble, records the result, and returns the marble to its bag.  She repeats this experiment 20 times.  Her results are shown in the table.

 

Based on these results, predict the number of times Olivia will draw a blue marble from the bag if she repeats the experiment 200 times. (TEKS 7.6C)

• 20

• 40

• 100

• 200

Caiden flipped three coins during a probability experiment. The outcomes of the first 30 trials are shown in the table.

Based on the information in the table, in how many of the next 120 trials will the outcome be exactly two of the coins showing heads? (7.6C-SS)

• 60

• 52

• 40

• 92

In Ms. Vela's 3rd period class, 12 out of 25 students participate in athletics. Based on this information, if there are 400 students in the 7th grade, how many students could be expected to participate in athletics? (7.6C)

• 192

• 96

• 200

• 84

Tags

CCSS.7.RP.A.2C

A marble will be drawn from the bag and replaced 120 times.  What is a reasonable prediction for the number of times a red or yellow marble will be drawn? (7.6D-SS)

• 7

• 42

• 60

• 140

If you were to roll a 6-sided die 72 times, how many times would you predict to get a 5?

• 12

• 36

• 1

• 6

• 24

Answer explanation

1/6 = x/72

Tags

6.4.1.4

6.4.1.3

A reasonable mathematical guess that something is about to happen

• Probability

• Compound Event

• Prediction

• Sample Space

Answer explanation

A reasonable mathematical guess that something is about to happen is called a Prediction.

Alejandro rolls a die and flips a coin 20 times. The results are shown in the table.  If Alejandro rolls a die and flips a coin an additional 150 times, how many times should he expect to roll an odd number and have the coin land with the tail side facing up? (7.6C-SS)

• 4

• 90

• 25

• 30

A bag contains: - 4 red marbles - 6 blue marbles - 3 green marbles - 4 black marbles - 3 yellow marbles A marble will be drawn from the bag and replaced 100 times. What is a reasonable prediction for the number of times a green or black marble will be drawn? (7.6D-SS

• 50

• 35

• 45

• 14

Leslie has two cups containing different colored paper clips. 

What is the probability that Leslie will randomly select a blue paper clip from the first cup and then randomly select an orange paper clip from the second cup? (7.6D-SS)

A bag of fruit contains 3 apples, 2 oranges, 1 banana, and 4 pears.  Luis will randomly select two pieces of fruit one at a time from the bag and not put the fruit back. What is the probability that the first piece of fruit Luis selects will be a banana and the second piece of fruit will be an orange?  (7.6D-SS)