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Vesnalui [34]
2 years ago
9

4. Steve has a card collection. He keeps 12 of the cards in a pocket, which

Mathematics
1 answer:
BabaBlast [244]2 years ago
4 0

Answer:

I think 80

Step-by-step explanation:

100/15=6.66666667

12x6.67=80.4

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3 years ago
A random variableX= {0, 1, 2, 3, ...} has cumulative distribution function.a) Calculate the probability that 3 ≤X≤ 5.b) Find the
olchik [2.2K]

Answer:

a) P ( 3 ≤X≤ 5 ) = 0.02619

b) E(X) = 1

Step-by-step explanation:

Given:

- The CDF of a random variable X = { 0 , 1 , 2 , 3 , .... } is given as:

                    F(X) = P ( X =< x) = 1 - \frac{1}{(x+1)*(x+2)}

Find:

a.Calculate the probability that 3 ≤X≤ 5

b) Find the expected value of X, E(X), using the fact that. (Hint: You will have to evaluate an infinite sum, but that will be easy to do if you notice that

Solution:

- The CDF gives the probability of (X < x) for any value of x. So to compute the P (  3 ≤X≤ 5 ) we will set the limits.

                   F(X) = P ( 3=

- The Expected Value can be determined by sum to infinity of CDF:

                   E(X) = Σ ( 1 - F(X) )

                   E(X) = \frac{1}{(x+1)*(x+2)} = \frac{1}{(x+1)} - \frac{1}{(x+2)} \\\\= \frac{1}{(1)} - \frac{1}{(2)}\\\\= \frac{1}{(2)} - \frac{1}{(3)} \\\\=  \frac{1}{(3)} - \frac{1}{(4)}\\\\= ............................................\\\\=  \frac{1}{(n)} - \frac{1}{(n+1)}\\\\=  \frac{1}{(n+1)} - \frac{1}{(n+ 2)}

                   E(X) = Limit n->∞ [1 - 1 / ( n + 2 ) ]  

                   E(X) = 1

8 0
2 years ago
I need help please help m
Bond [772]

there are 10 numbers you want either a 4 or 7 ( 2 numbers)

 so probability is 2/10 which reduces to 1/5

5 0
2 years ago
For cheerleading practice, Kiara must be able to lift her legs so that they are parallel to her outstrached arms. For each side
podryga [215]
If this is the dance position you are describing, then the arm and the leg of the dancer both make "right" angles (90º angles) to the floor.
5 0
3 years ago
100 points to correct answer!!!
Korvikt [17]

Answer:

but u have only provided 5 pts first give 100 pts and I will help u.

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