This handy Spectrum Math Grade 7 Answer Key Chapter 7 Lesson 7.1 Understanding Probability provides detailed answers for the workbook questions
Spectrum Math Grade 7 Chapter 7 Lesson 7.1 Understanding Probability Answers Key
An experiment is an activity in which results are observed. Each round of an experiment is called a trial, and the result of a trial is called an outcome. A set of one are more outcomes is an event.
The probability of an event is a measure of the likelihood that the event will occur. This measure ranges from 0 to I and can be written as a ratio, fraction, decimal, or percent. To calculate probability, you must first know the number of possible outcomes.
The possible outcomes when you roll a die are the following: 1, 2, 3, 4, 5, and 6.
Every outcome is equally likely.
There is no chance that we can roll a 7.
Answer each question below based on the experiment described.
Question 1.
You flip a coin.
a. Possible outcomes? ____________
Answer:
Heads, Tails,
Explanation:
By flip a coin the number of outcomes are 2 that is heads, tails.
b. Outcomes equally likely? (Yes or no)
Answer:
Yes,
Explanation:
Yes, Every outcome is equally likely.
Question 2.
You roll a pair of dice and find the sum.
a. Possible outcomes? ____________
Answer:
36,
Explanation:
By roll a pair of dice the possible outcomes are 36 respectively.
b. An impossible outcome?
Answer:
7,
Explanation:
There is no chance to roll 7 the dice.
Question 3.
A bowl contains 15 red marbles and 5 green marbles.
a. Possible outcomes?
Answer:
75,
Explanation:
Given bowl contains number of red marbles are 15 and number of green marbles are 5. So number of possible outcomes are 15 X 5 = 75.
b. Most likely outcome?
Answer:
Red marble,
Explanation:
Red marble is most likely outcome.
Question 4.
Twenty names are written on slips of paper in a basket.
a. Possible outcomes?
Answer:
All names.
Explanation:
Possible outcomes for twenty names are 20 respectively.
b. Outcomes equally likely? (Yes or no)
Answer:
Yes,
Explanation:
Yes, every outcome is equally likely.