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3 years ago

I suck at basic Geometry. ( episode 3)

Mathematics

1 answer:

aalyn [17]3 years ago

6 0

Answer:

I am so sorry I did not mean to answer this question, can anyone help me answer it?

Step-by-step explanation:

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. Let X and Y be random variables of possible percent returns (0%, 10%,

bazaltina [42]

(a) The marginal distribution of X is

Pr(X = x) = ∑ Pr(X = x, Y = y)

… = 0.0625 + 0.0625 + 0.0625 + 0.0625

… = 0.25

That is, the first equality follows from the law of total probability, with the sum taken over y from {0, 5, 10, 15}. Each probability Pr(X = x, Y = y) is given in the table to be 0.0625.

Similarly, the marginal distribution of Y is

Pr(Y = y) = 0.25

(b) Yes, they're independent because

Pr(X = x, Y = y) = 0.0625,

and

Pr(X = x) Pr(Y = y) = 0.25 • 0.25 = 0.0625.

E[X] = ∑ x Pr(X = x)

… = 0.25 ∑ x

… = 0.25 (0 + 5 + 10 + 15)

… = 7.5

and you would find the same mean for Y,

E[Y] = 7.5

The variance of X is

V[X] = E[X^2] - E[X]^2

… = (∑ x^2 Pr(X = x)) - 7.5^2

… = 0.25 (∑ x^2) - 56.25

… = 0.25 (0^2 + 5^2 + 10^2 + 15^2) - 56.25

… = 31.25

and similarly,

V[Y] = 31.25

(each sum is taken with x and y from {0, 5, 10, 15})

7 0

3 years ago

Triangle A is a scaled version of triangle B. The dimensions of triangle B are twice the dimensions of triangle A. The area of t

zimovet [89]

24.

This is because if we double the base and the height in the area equation it will raise any number by a factor of 4.

6 0

3 years ago

Two step equations 6=a/4+2

anygoal [31]

6=a/4+2
4=a/4
4*4=a
16=a

6 0

3 years ago

Please please help me !!

stira [4]

Answer:

your answer is (-12,2)

3 0

3 years ago

Can you copy worksheet

lys-0071 [83]

What worksheet or are you talking to somebody else

8 0

3 years ago