![subject](/tpl/images/cats/mat.png)
Mathematics, 17.07.2019 06:10 Byanka032801
The random variable x represents the number of boys in a family with three children. assuming that births of boys and girls are equally likely, find the mean and standard deviation for the random variable x.
a) mean: 1.50; standard deviation: .87
b) mean: 2.25; standard deviation: .76
c) mean: 2.25; standard deviation: .87
d) mean: 1.50; standard deviation: .76
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/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 14:30
Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 17:00
Find dy/dx using implicit differentiation ln(20+e^xy)=y
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:00
Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:00
Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable
Answers: 3
You know the right answer?
The random variable x represents the number of boys in a family with three children. assuming that b...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2022 18:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 05.01.2022 18:50
![question](/tpl/images/cats/istoriya.png)
History, 05.01.2022 18:50
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2022 18:50
![question](/tpl/images/cats/en.png)
English, 05.01.2022 18:50
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2022 18:50
![question](/tpl/images/cats/pravo.png)
Law, 05.01.2022 18:50
![question](/tpl/images/cats/istoriya.png)
History, 05.01.2022 18:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 05.01.2022 18:50
![question](/tpl/images/cats/biologiya.png)
Biology, 05.01.2022 18:50
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 05.01.2022 18:50
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 05.01.2022 19:00
![question](/tpl/images/cats/istoriya.png)
History, 05.01.2022 19:00
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2022 19:00
![question](/tpl/images/cats/mat.png)
Mathematics, 05.01.2022 19:00