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Vadim26 [7]
3 years ago
9

I need them all answered

Mathematics
1 answer:
Juliette [100K]3 years ago
5 0
X=12/11 for the first one
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Let (X1, X2, X3, X4) be Multinomial(n, 4, 1/6, 1/3, 1/8, 3/8). Derive the joint mass function of the pair (X3, X4). You should b
Ket [755]

Answer:

The random variables in this case are discrete since they have a Multinomial distribution.

The probability mass function for a discrete random variable X is given by:

P(X=x_{i}  )

Where are x_{i} are possible values of X.

The joint probability mass function of two discrete random variables X and Y is defined as

P(x,y) =P(X=x,Y=y).

It follows that, The joint probability mass function of X_{3}   , X_{4} is :

P(X_{3}, X_{4} ) = P( X_{3} = x_{3}, X_{4} = x_{4} ) =\frac{1}{8} +\frac{3}{8} =\frac{1}{2}

8 0
3 years ago
Gavin works as a salesperson at an electronics store and sells phones and phone accessories. Gavin earns a $13 commission for ev
steposvetlana [31]

Answer:

$144

Step-by-step explanation:

Since he sells 6 phones you multiply $13 x 6 which equals 78. Also since he sells 22 accessories you multiply 22 x $3 which equals 66. You then add $78 and $66 which equals $144 in total.

6 0
3 years ago
13 in = ___________ ft
ladessa [460]

Answer:

1.0833333 Feet

Hope this helps! If I could have brainliest im trying to level up.

Step-by-step explanation:

13 Inches =

1.0833333 Feet

(rounded to 8 digits)

7 0
3 years ago
Write an expression to represent:<br><br> Four less than the product of one and a number x .
Mariulka [41]
Product of 1 and x = x × 1 = x

4 less than product of 1 and x = x - 4

Thus, the expression to represent Four less than the product of one and a number x is (x - 4)

\textbf{  \large \: \red{Answer: x-4}}


7 0
3 years ago
Read 2 more answers
9. What is the area of the largest square?<br> A=2<br> A=36units2<br> A=64units2
KIM [24]

Answer:

If you mean Area=2 and Area=36units times 2 and Area=64units times 2, then the answer is that A = 64units times 2 would be the largest square.

Step-by-step explanation:

The larger the area, the larger the square. The first square has an area of 2. The second square has an area of 72, and the third square has an area of 128, so the third square is the biggest.

5 0
3 years ago
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