Making Predictions from Probability

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 bag contains: - 6 blue marbles - 5 red marbles - 3 green marbles - 4 black marbles - 2 yellow marbles 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

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

Look at the diagram. It represents a 6-by-6 foot board. A point randomly chosen from the board 72 times. Which statement is true?

• The selected point is more likely to be in the shaded area than the unshaded area.

• The selected point is equally likely to be in the shaded area than the unshaded area.

• The selected point is less likely to be in the shaded area than the unshaded area.

• The selected point is certain to be in the unshaded area.

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.

Look at the diagram. It represents a 6-by-6 foot board. A point randomly chosen from the board 72 times.

• The selected point is more likely to be in the shaded area than the unshaded area.

• The selected point is equally likely to be in the shaded area than the unshaded area.

• The selected point is less likely to be in the shaded area than the unshaded area.

• The selected point is certain to be in the unshaded area.

Look at the diagram. It represents a 6-by-6 foot board. A point randomly chosen from the board 72 times.

• The selected point is more likely to be in the shaded area than the unshaded area.

• The selected point is equally likely to be in the shaded area than the unshaded area.

• The selected point is less likely to be in the shaded area than the unshaded area.

• The selected point is certain to be in the unshaded area.

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