Probability Do now Lesson 4

Fill in the blank:

______________ is a method used by researchers when it is difficult to collect experimental data or when the theoretical probability is unknown.

Probability can be used to make _________ for future occurrences by setting up and solving a proportion.

On a youth soccer team 3 out of 12 team members have played in previous years. Based on this information, if 180 kids are in the youth soccer league, then hoe many could be expected to have played the year before?

• 140

• 36

• 45

• 84

• None of these answers are correct.

A basket of beads contains 8 red beads, 6 yellow beads, and 6 green beads. A bead will be drawn from the basket and replaced 60 times. What is the reasonable prediction for the number of time a green bead is drawn?

• 48

• 18

• 36

• 30

The list shows the different choices of pizza at the local pizza shop:

pepperoni-11

supreme-7

cheese-6

Hawaiian-3

Based on these results, if 189 pizzas were sold, then how many could be expected to be cheese?

• 45

• 21

• 27

• 42

The questions on a multiple choice test each have 6 answer choices. Which model can be used to simulate randomly selecting the correct answer on a 20 question multiple choice test?

• rolling a six-sided number cube 6 times
• rolling a six-sided number cube 20 times
• spinning a spinner with 4 equal sized sections 4 times
• choosing 1 marble in a bag of 20 different colored marbles

Tags

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Which is the best way to represent answering 25 multiple-choice questions with 4 choices for each answer?

• spin a spinner with four sections 25 times
• roll a die 25 times
• flip a coin 25 times
• roll a die 4 times

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A certain brand of TV has a 50% chance of being defective. Which model could be used to determine the probability that when two TVs are chosen, they will both be defective?

• spin a spinner with 4 equal sections
• roll a die twice
• flip a coin twice
• flip a coin, then roll a die

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Samuel has 5 different colors of pens and 2 different colors of paper. Which model could be used to show how many different choices he has?

• spin a spinner with 5 sections, then flip a coin
• roll a die 5 times
• flip a coin 5 times
• roll a die, then flip a coin 5 times

Tags

CCSS.7.SP.C.7

CCSS.7.SP.C.8

An ice cream parlor offers 15 different flavors of ice cream. Which model could be used to show how many different choices there are?

• spin a spinner with 5 sections
• flip a coin
• spin a spinner with 15 sections
• roll a die and flip a coin

Tags

CCSS.7.SP.C.7

CCSS.7.SP.C.8