Probability and Complements
starstarstarstarstarstarstarstarstarstar
by Judy Riggle
| 10 Questions
Note from the author:
Probability and it's complement.
1
1 pt
Erica rolls a six-sided number cube once. What is the probability that Erica rolls a 4?
Put your answer in the form of a fraction.
2
1 pt
The complement of an event includes all outcomes that are not the desired outcome. What is the probability of the complement of Erica's roll above? Put your answer as a fraction.
3
1 pt
Sam spins a spinner with 4 equal sections labeled A, B, C, & D. What is the probability the spinner lands on B?
Put your answer in the form of a decimal.
4
1 pt
What is the probability of the complement of Sam not spinning B on the spinner? Put your asnwer in the form of a decimal.
5
1 pt
Nikita went to a sports store to purchase a basketball. In the bin were 7 red, 6 blue, 3 white, and 4 green basketballs. If Nikita were to pick a basketball at random from the bin, what is the probability she will choose a red basketball? Record your answer as a percent.
6
1 pt
What is the complement of Nikita picking a red basketball? Write your answer as a percent.
7
1 pt
What conclusion can be drawn about the relationship between the probability of an event and its complement?
8
1 pt
Rodrigo chooses a book from the box. The box has 12 science fiction books, 16 mystery books and 12 mythology books. If Rodrigo randomly chooses a book from the box, determine the probability that it will NOT be a science fiction book. Write your answer in the form of a decimal.
9
1 pt
A box of multi-color paper clips contains 25 red clips, 15 blue clips, 15 green clips and 20 pink clips. If Roy reaches into the box and pulls out 1 paper clip without looking, what is the probability he will select a red or blue paper clip? Write your answer as a fraction.
10
1 pt
When a coin is flipped, the probability of landing on heads is 1/2 and the probibility of landing on tails is also 1/2. Why is landing on tails the complement of landing on heads?
Add to my formatives list

Formative uses cookies to allow us to better understand how the site is used. By continuing to use this site, you consent to the Terms of Service and Privacy Policy.