What are complementary events in probability?

Understanding Complementary Events

Quiz
•
English
•
8th Grade
•
Easy
Allan Ngongoloy
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Events that have no relation to each other
Events that are always independent of one another
Events that cannot occur simultaneously
Complementary events are pairs of outcomes in probability that together encompass all possible outcomes, where the occurrence of one event means the other cannot occur.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the probability of an event A is 0.7, what is the probability of its complementary event?
0.5
0.3
0.9
0.1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a class of 30 students, 18 are girls. What is the probability of randomly selecting a boy?
0.6
0.5
0.3
0.4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the probability of raining tomorrow is 0.4, what is the probability that it will not rain?
0.8
0.6
0.2
1.0
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain how complementary events can be used in real-life situations.
Complementary events are irrelevant in business decision-making.
Complementary events can predict exact outcomes in sports.
Complementary events can be used to simplify decision-making in uncertain situations, such as weather forecasts or risk assessments.
Complementary events are only applicable in mathematical contexts.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A die is rolled. What is the probability of not rolling a 3?
1/2
4/6
5/6
2/3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the probability of winning a game is 0.25, what is the probability of losing?
0.50
0.75
0.10
0.90
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