![subject](/tpl/images/cats/mat.png)
Mathematics, 14.04.2020 15:54 missheather0309
A middle school principal has 80 keys on her key chain to distribute to staff on the first day of school. Of these
80 keys, 60 open classroom doors, 40 open the door to the teachers' lounge, and 30 open classroom doors and
the teachers' lounge. Using this information, answer each of the following questions.
Let C be the event that a randomly selected key opens a classroom and T be the event that a randomly
selected key opens the teachers' lounge.
What is P(C), the probability that a key opens a classroom?
What is P(T), the probability that a key opens the teachers' lounge?
What is P(C and T'), the probability that a key opens a classroom and the teachers' lounge?
What is P(C or T), the probability that a key opens a classroom or the teachers' lounge?
Show Calculator
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 14:50
Name the most appropriate metric unit for each measurement like the mass of cow
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:00
Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:10
2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:30
]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle
Answers: 2
You know the right answer?
A middle school principal has 80 keys on her key chain to distribute to staff on the first day of sc...
Questions
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 05.10.2020 15:01
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.10.2020 15:01
![question](/tpl/images/cats/mat.png)
Mathematics, 05.10.2020 15:01
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 05.10.2020 15:01
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 05.10.2020 15:01
![question](/tpl/images/cats/mat.png)
Mathematics, 05.10.2020 15:01
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/es.png)
Spanish, 05.10.2020 15:01
![question](/tpl/images/cats/en.png)
English, 05.10.2020 15:01
![question](/tpl/images/cats/mat.png)
Mathematics, 05.10.2020 15:01
![question](/tpl/images/cats/mat.png)
Mathematics, 05.10.2020 15:01
![question](/tpl/images/cats/biologiya.png)
Biology, 05.10.2020 15:01
![question](/tpl/images/cats/en.png)
English, 05.10.2020 15:01
![question](/tpl/images/cats/himiya.png)