Probability Do now Lesson 2

The ratio of the number of times an event occurs to the total number of trials is ________probability.

• experimental

• theoretical

____________ probability of an event happening based on the possible outcomes.

• experimental

• theoretical

As the number of trials increases, the relative frequency of an event will approach the (a)   probability.

_______________ _____________ is the total number of successful attempts divided by the total number of trials. It can be used to make predictions.

• relative frequency

• theoretical probability

• make predictions

• should happen

Ms. Mitchells' coin purse has 20 coins. There are 6 pennies, 4 quarters, 3 dimes, and the remainder are nickels. What is the theoretical probability of randomly selecting a nickel from Ms. Mitchells' coin purse?

• 7/20

• 1/5

• 3/10

• 1/2

Tags

CCSS.7.SP.C.7B

Ms. Mitchells' coin purse has 20 coins. There are 6 pennies, 4 quarters, 3 dimes, and the remainder are nickels. What is the theoretical probability of randomly selecting a dime from Ms. Mitchells' coin purse?

• 7/20

• 1/5

• 3/10

• 1/2

• 3/20

Tags

CCSS.7.SP.C.7B

Ms. Mitchells' coin purse has 20 coins. There are 6 pennies, 4 quarters, 3 dimes, and the remainder are nickels. What is the theoretical probability of randomly selecting a quarter from Ms. Mitchells' coin purse?

• 7/20

• 1/5

• 3/10

• 1/2

• 3/20

Tags

CCSS.7.SP.C.7B

Mrs. Irons places the names of her four children in a hat. She randomly draw a name, places it back in the hat, and draws again. The results are shown below.

Draw 1: Ella

Draw 2: Jake

Draw 3: Alex

Draw 4: Alex

Draw 5: Jake

Draw 6: Joey

Draw 7: Alex

Draw 8: Ella

Draw 9: Alex

Draw 10: Jake

What is the theoretical probability of selecting the name Joey?

• 1/4

• 2/5

• 200

• 250

Tags

CCSS.7.SP.C.7B

Mrs. Irons places the names of her four children in a hat. She randomly draw a name, places it back in the hat, and draws again. The results are shown below.

Draw 1: Ella

Draw 2: Jake

Draw 3: Alex

Draw 4: Alex

Draw 5: Jake

Draw 6: Joey

Draw 7: Alex

Draw 8: Ella

Draw 9: Alex

Draw 10: Jake

What is the experimental probability of selecting the name Alex?

• 1/4

• 2/5

• 200

• 250

Tags

CCSS.7.SP.C.6

Mrs. Irons places the names of her four children in a hat. She randomly draw a name, places it back in the hat, and draws again. The results are shown below.

Draw 1: Ella

Draw 2: Jake

Draw 3: Alex

Draw 4: Alex

Draw 5: Jake

Draw 6: Joey

Draw 7: Alex

Draw 8: Ella

Draw 9: Alex

Draw 10: Jake

If the experiment was repeated 1,000 times, then how many times could you expect to draw Ella's name?

• 1/4

• 2/5

• 200

• 250

Tags

CCSS.7.SP.C.6