Please answer! :? l gujf

Pick two cards at random from a well-shuffled deck of 52 cards (pick them simultaneously so they are not the same card). There a

Scrat [10]

Answer:

The variables X and Y are dependent.

Step-by-step explanation:

The variable X denotes number of face cards . That is it can take values,

X = {0, 1, 2 }

Compute the probability for all he values of X as follows:

P [X = 0] = P (None of the 12 card is chosen in either draw)

= (40/52)×(39/51)

= 1560/2652

= 0.5882

P [X = 1] = P (One of the card is face card is selected)

= 2×(40/52)×(12/51)

= 960/2652

= 0.3619

P [X = 2] = P (Two of the 12 card is chosen in the draw)

= (12/52)×(11/51)

= 132/2652

= 0.0498

The variable Y denotes number of cards numbered 10 . Thus, it can take values:

Y = {0, 1, 2 }

P [Y = 0] = P (None of the 4 card is chosen in either draw)

= (48/52)×(47/51)

= 2256/2652

= 0.8507

P [Y = 1] = P (One of the 4 card is chosen in either draw)

= 2×(4/52)×(48/51)

= 384/2652

= 0.1448

P [Y = 2] = P (Two of the 4 card is chosen in the draw)

= (4/52)×(3/51)

= 12/2652

= 0.0045

Now compute the probability of (X and Y).

P [X = 0 and Y = 0] = P(None of the 16 card is chosen in either draw)

= (36/52)×(35/51)

= 1260/2652

= 0.4751

The variables X and Y are independent if,

P [X = 0 and Y = 0] = P [X = 0] × P [Y = 0]

= P [X = 0] × P [Y = 0]

= 0.8507 × 0.5882

= 0.5204

The two values are not equal.

Hence, the variables X and Y are not independent.

7 0

3 years ago

I solved some of it but now I don't know if you continue it correctly ... To be performed: (lesson: Raducali of order "n")

nikitadnepr [17]

Answer:

-9

Step-by-step explanation:

$( \sqrt[4]{7} + 2)( \sqrt[4]{7} - 2)( \sqrt{7} + 4) \\ = ( { \sqrt[4]{7} }^{2} - {{2} }^{2} )( \sqrt{7} + 4) [because (a+b)(a-b) = a² - b²]\\ = ( \sqrt{7} - 4)( \sqrt{7} + 4) \\ = { \sqrt{7} }^{2} - {4}^{2}[because (a+b)(a-b) = a² - b²] \\ = 7 - 16 \\ = - 9$

5 0

3 years ago

Read 2 more answers

Rita has already prepared 3 kilograms of dough and will continue preparing 1 kilogram of dough every hour. How much dough did Ri

Digiron [165]

Answer:

12

Step-by-step explanation:

9+3=12

hope it helps

btw I need one more brainliest to level up

6 0

3 years ago

3x +(5x+2x) communative and distrbutibe properties

LenaWriter [7]

Answer:

5+2=7x+3x= 10x is the right answer

6 0

3 years ago

Read 2 more answers

The question in the image.

GREYUIT [131]

Answer:

500 boxes

Step-by-step explanation:

hey there,

< Since "p" stands for profits, change "p" to 0 (since the question says 0 profits).

Here is how your equation would look like:

$0 = -n^2 + 300n + 100000$

Pretend like "n" is "x" since that is the variable we are trying to find here.

Solve for "n". Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

"n" actually ends up equaling 500, -200.

Obviously, negative can't be the answer because you can't have a negative amount of boxes. So 500 boxes would be your answer. 200 CAN'T be your answer either because it is a negative!! >

Hope this helped! Feel free to ask anything else.

6 0

3 years ago