Probability

Expressions and Equations

100

Ms. Harrigan hired a clown for her daughters 3-hour party. The clown had a entertainment fee of $35 and charged an hourly rate. The total bill for the clown was $100. Write an equation that could be used to find the hourly rate.

100-35=3x or 3x+35=100

200

Which of these expressions is not equivalent to 8x+32? 2(4x + 20) - 8, 6x +12 + 2x +20, 4(2x+16), 16 + 2(2x + 4),

4(2x+16)

300

Mrs. Foxton hired a roofer for a 4-hour job. Materials were $220 and the total bill was $457. Write two equations that are equivalent and can be used to determine the hourly rate.

457-220=4x & 4x+220=457

400

4x + 28 and 2(2x+14) are equivalent expressions. Create another expression that is also equivalent to these two.

Sample answers: 4x + 20 + 8, 4(x+7), 2x + 14 + 2x + 14, 4(x+5) + 8

500

Ms. Jeun and Mr. Anderson both earn 3 credits for each hour spent in the classroom. This week Ms. Jeun wrote a paper for an additional 4 credits. Write an expression that represents the total number of credits earned by Ms. Jeun and Mr. Anderson; where a is the number of hours Mr. Anderson spent in the classroom and j is the number of hours Ms. Jeun spent in the classroom.

3a + 3j +4

Fraction, Decimal, Percent

100

What are the fraction and percentage equivalents of 0.50?

1/2 & 50%

200

A spinner has 5 equal sections labeled 1-5. What is the probability of spinning a 2? List as a fraction and a decimal.

1/5 & 0.2

300

Jose determined that the probability of an event occurring was 12/48. Write this probability as a simplified fraction, decimal, and percent.

1/4, 0.25, & 25%

400

Tyler determined that the probability of pulling a grape flavored jolly rancher from a bag is 16/50. What is the percentage probability of this occurrence?

32%

500

There is a 60% chance that any student in Ms. Harrigan's class will receive candy. Out of her 30 students, predict how many will get candy.

18

Spinners/Random Number Assignment

100

Petsmart recently stated that 10% of all pets bought are birds. Caleb wants to design a simulation using a spinner to determine the likelihood of 1 bird being purchased when 4 pets are randomly selected. How many sections should his spinner have?

10

200

The probability of selecting one student that wears Jordans from a class is 6/20. Predict how many students out of 200 are likely to wear Jordans.

60

300

In a classroom, 20% of students have freckles. I want to design a spinner simulation that shows students with and without freckles. Draw what should my spinner look like.

5 or 10 sections.

400

Kely has a free throw shooting average of 30%. He wants to design a random number simulation to show the low probability of him making a free throw. Using the digits 0-9, assign numbers to Kely making a free throw and missing a free throw.

Making: 0-2, Missing: 3-9 or Missing 0-6, Making: 7-9

500

A spinner has ten equal sections labeled 1-10. What is the difference in probability of spinning a number greater than 7 and spinning an even number? Write your answer in decimal and percent.

0.2, 20%

Predictions

100

Jason has a 1/4 probability of guessing the correct answer on a multiple choice test. If he guesses for an entire test of 200 questions, how many questions will he get correct?

50

200

Edwin is conducting an experiment where each night he flips a coin to decide whether or not he should have dessert (Heads he does, Tails he doesn't). Use the theoretical probability to predict the number of nights in April that Edwin will have dessert.

15

300

30% of the lights driven through on any given day are red when first approached. If Yaw drives through 40 lights over the weekend, predict how many are red when he first approaches them.

12

400

24 of the 100 Skittles from Addy's bag are yellow. If her mom bought 7 bags, each containing 100 candies, how many can she expect to be yellow?

168

500

Ms. Harrigan asked 250 students at Meade High what their favorite breakfast is. 43 chose breakfast bars, 45 cereal, 39 bagel, 44 poptart, 42 fresh fruit, and 37 skip breakfast. Use these numbers to predict how many students out of the 1000 that attend Meade high skip breakfast.

148

Grab Bag Probability

100

Why are samples of 250 people more reliable for predicting probabilities than samples of 25 people?

Law of Large numbers

200

I have in my container, 6 starburst, 4 jolly ranchers, 3 fun dip, and 7 twizzlers. Create a table with the probability of selecting a candy from my container.

Table

300

An experiment with coin flipping produced 24 Heads and 76 Tails. What is the theoretical probability of flipping a tails? Answer in percentage.

50%

400

An experiment with coin flipping produced 24 Heads and 76 Tails. What is the difference in theoretical and experimental probability of flipping a heads? Answer in percentage.

24%

500

Maylyn recorded the results of spinning a 5-section spinner several times. Her results are listed below: Red 25 Blue 14 Orange 21 Yellow 23 Purple 17 What is the probability of spinning a blue or yellow? Write your answer as a fraction, decimal, and percent.

37/100, 0.37, 37%