There are three sets of key rings A, B and C, for a house. The first set has five keys, the second has seven and the third has eight, of which only one key in each set opens the door to the storeroom. A keychain is chosen at random followed by a key from the set. a. What is the probability of the selected key being able to open the storeroom? b. What is the probability that the chosen key chain is from the third set and the key does not open the door? c. What is the probability that the chosen key opens the door, and it came from the first key chain?
There are three sets of key rings A, B and C, for a house. The first set has five keys, the second has seven and the third has eight, of which only one key in each set opens the door to the storeroom. A keychain is chosen at random followed by a key from the set. a. What is the probability of the selected key being able to open the storeroom? b. What is the probability that the chosen key chain is from the third set and the key does not open the door? c. What is the probability that the chosen key opens the door, and it came from the first key chain?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter12: Angle Relationships And Transformations
Section: Chapter Questions
Problem 70CUR
Related questions
Question
There are three sets of key rings A, B and C, for a house. The first set
has five keys, the second has seven and the third has eight, of which only one
key in each set opens the door to the storeroom. A keychain is chosen at random
followed by a key from the set.
a. What is theprobability of the selected key being able to open the
storeroom?
b. What is the probability that the chosen key chain is from the third set and
the key does not open the door?
c. What is the probability that the chosen key opens the door, and it came
from the first key chain?
has five keys, the second has seven and the third has eight, of which only one
key in each set opens the door to the storeroom. A keychain is chosen at random
followed by a key from the set.
a. What is the
storeroom?
b. What is the probability that the chosen key chain is from the third set and
the key does not open the door?
c. What is the probability that the chosen key opens the door, and it came
from the first key chain?
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