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tresset_1 [31]
3 years ago
9

How do i work out the probability of rolling two sixes

Mathematics
1 answer:
Olegator [25]3 years ago
5 0

Answer: p = 1/25

Step-by-step explanation:

Ok, you know that the probability of rolling a six is p = 1/5

now, if you want to have two sixes, then you have two events with a probability of 1/5.

And as you know the joint probability for two events is equal to the product of the probabilities, then the probability of rolling two sixes is:

p = (1/5)*(1/5) = 1/25.

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The ground temperature at an airport is 16 °C. The temperature decreases by 6 °C for every increase of 1 kilometer above the gro
Kitty [74]

Answer:

i think its -14

Step-by-step explanation:

it says the temperature decreases by 6 for every 1 kilometer

if you subtract 30 from 16 (because 6 time 5 is 30)

you get -14

im not 100% sure tho

4 0
3 years ago
Someone pls help me on this one ​
ICE Princess25 [194]

Answer:

46

Step-by-step explanation:

8 0
4 years ago
I need help fast please
aleksandrvk [35]

Circumference of Circle A is is 42pi.

It is the same for all circles. To find the circumference, one must use the constant equation of 2pir. This equation stays the same, no matter what.

7 0
4 years ago
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RideAnS [48]
What is your question
5 0
3 years ago
In 2009 a survey of Internet usage found that 79 percent of adults age 18 years and older in the United States use the Internet.
Alex777 [14]

Answer:

0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}

Option d.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

79 percent of adults age 18 years and older in the United States use the Internet.

This means that \pi = 0.79

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.33.

Which of the following should be used to find the sample size (n) needed?

We have to find n for which M = 0.025

So the equation is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}

Option d.

4 0
3 years ago
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