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Nataliya [291]
3 years ago
5

Pls help meeeeeeeeeeee

Mathematics
2 answers:
natka813 [3]3 years ago
8 0
<h2>Answer:</h2>

<h3>1)    \frac{1}{2}</h3><h3>3)   \frac{1}{6}</h3><h3>5)   \frac{2}{3}</h3><h3 /><h2>Step-by-Step Explanation:</h2><h3 />

1.<em> </em>Find the probability of rolling less than a four.

<u>Probability Outcomes</u> = 1, 2, 3, 4, 5, 6

<u>Outcomes lower than four</u> = 1, 2, 3

Then to answer it you need the probability in the form of a fraction.

\frac{3}{6} simplifies into \frac{1}{2}

2. Find the probability of rolling an even prime number.

<u>Probability Outcomes</u> = 1, 2, 3, 4, 5, 6

<u>Prime Numbers Through 1-6</u> = 2, 3, 5

<u>Even Prime numbers Through 1-6</u> = 2

So the probability in the form of a fraction.

<h3>\frac{1}{6}</h3><h3 />

3. Find the probability of rolling factors of 20.

<u>Probability Outcomes</u> = 1, 2, 3, 4, 5, 6

<u>Factors of 20 Through 1-6</u> = 1, 2, 4, 5

So probabilty in the form of a fraction.

\frac{4}{6} simplifies into \frac{2}{3}

<h3>That's all! I hope this helps! If you ever need my help, just friend me and message me!</h3>
lapo4ka [179]3 years ago
3 0
1/2 1/6 2/3 Because of probability
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Given the joint cumulative distribution of X and Y as

F(x,y) = \frac{xy(x+y)}{2000000}\ \ \ \, \ 0\leq x100, 0\leq y\leq 100

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F_x(x)=F(x,100)\\\\\\=\frac{100x(x+100)}{2000000}\\\\\\\\=\frac{100x^2+10000x}{2000000}\\\\\\=>f_x(x)=\frac{x}{10000}+\frac{1}{200}

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Hence, the Var(X) is 764.28  

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