Mathematics High School

this is to do with independant events & probability trees

There is a bag filled with 3 blue and 5 red marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 reds?

Answers

Answer 1

Answer: The probability of getting two red marbles is P = 0.141

Step-by-step explanation:

We know that in the bag there are 3 blue marbles and 5 red marbles, then there is a total of 8 marbles in the bag.

The probability of taking at random a red marble is equal to the quotient between the number of red marbles and the total number of marbles, this is:

p = 3/8

Suppose we got a red marble:

Now we replace the red marble we took, so in the bag there are again 3 red marbles and 8 total marbles, then the probability of getting another red marble is again:

q = 3/8

The joint probability (this is, the probability of both events happening) is equal to the product of the individual probabilities, with gives us:

P = p*q = (3/8)*(3/8) = 9/64 = 0.141

Related Questions

Solve the equation for b 5= 3/2 (3) + b

Answers

Answer:

The answer is b = 1/2

Step-by-step explanation:

1) Use this rule: a/b × c = ac/b.

[tex]5 = \frac{3 \times 3}{2} + b[/tex]

2) Simplify 3 × 3 to 9.

[tex]5 = \frac{9}{2} + b[/tex]

3) Subtract 9/2 from both sides.

[tex]5 - \frac{9}{2} = b[/tex]

4) Simplify 5 - 9/2 to 1/2.

[tex] \frac{1}{2} = b[/tex]

5) Switch sides.

[tex]b = \frac{1}{2} [/tex]

Therefor, the answer is b = 1/2.

COMPARE The maximum distance traveled by the space shuttle can be determined using
the equation d = 4.8s, where d is the distance, in miles, and sis the number of seconds.
The table below shows the distance traveled by the Apollo 10 astronauts returning from
the moon.

Answers

I have no idea what what time I would get ty

10. If eight men can dig 10 ditches in an hour. How many men would be
required to dig 16 ditches?​

Answers

Answer:

12.8

Step-by-step explanation:

they can dig at a rate of 1.25

Just number 12 will mark brainly

Answers

C. 1/6 becuase there are six numbers you could possibly land on and it is facing one side up.

Answer:

1/6 becuase there are six numbers you could possibly land on and it is facing one side up.

Step-by-step explanation:

never disobay my math skills

CAN SOMEONE WHO IS GOOD AT MATH HELP PLEESE !! ALSO PLEASE PUT ACTUAL ANWSERS I DONT OPEN SKETCHY FILES ON MY COMPUTER !!

Answers

Answer: where?

Step-by-step explanation:

Answer:

What do you need help with?

Step-by-step explanation:

please help, will be greatful!

Answers

Answer:

y is 8

Step-by-step explanation:

First u do 13y-9y=4y

so you then have 4y-5=27

then you plus 5 to 27

u then have 4y=32

then divide 32 by 4

so you will get y=8

the answer is y is equal to 5 because when you move the -5 over to the other side it becomes 27+5 =32 now the 13y-9y=5y

NEED HELP ASAP! 15pts​

Answers

Answer:

B

Step-by-step explanation:

sorry if im wrong

It’s D. Have a nice rest of your day!

Independent practice question x/8-1/2=-7/2

Answers

You need to put more of the question for me to understand

Answer:

x = -24

Step-by-step explanation:

If you are to solve for x then multiply everything by 2 so

[tex]\frac{2x}{8}[/tex] - 1 = -7 now multiply everything by 8 to get rid of the fraction

2x - 8 = -56, solve for x so 2x = -48 so x = -24

im just begin lazy ok

Answers

Answer:

I am  being lazy too

Step-by-step explanation:

81 x 1 = 81

81 x 2 = 162

81 x 3 = 243

81 x 4 = 324

81 x 5 = 405

81 x 6 = 486

81 x 7 = 567

81 x 8 = 648

81 x 9 = 729

81 x 10 = 810

81 x 11 = 891

81 x 12 = 972

81 x 13 = 1053

81 x 14 = 1134

81 x 15 = 1215

81 x 16 = 1296

81 x 17 = 1377

81 x 18 = 1458

81 x 19 = 1539

81 x 20 = 1620

81 x 21 = 1701

81 x 22 = 1782

81 x 23 = 1863

81 x 24 = 1944

81 x 25 = 2025

81 x 26 = 2106

81 x 27 = 2187

81 x 28 = 2268

81 x 29 = 2349

81 x 30 = 2430

81 x 31 = 2511

81 x 32 = 2592

81 x 33 = 2673

81 x 34 = 2754

81 x 35 = 2835

81 x 36 = 2916

81 x 37 = 2997

81 x 38 = 3078

81 x 39 = 3159

81 x 40 = 3240

81 x 41 = 3321

81 x 42 = 3402

81 x 43 = 3483

81 x 44 = 3564

81 x 45 = 3645

81 x 46 = 3726

81 x 47 = 3807

81 x 48 = 3888

81 x 49 = 3969

81 x 50 = 4050

9(-5x - 2)
Please Solve

Answers

Answer:

-45x - 18

Step-by-step explanation:

distributive property

Answer:

x = 18/45 (or, in a decimal, 0.4). Someone correct me if I'm wrong. :)

Step-by-step explanation:

We have to use the distributive property here. That means that you multiply -5x by 9 and -2 by 9. So...

9*-5x = -45x

9*-2 = -18

-45x = -18

Now, divide both sides by 45...

-45x/45 = -18/45

x = 18/45 should be the answer.

I don’t know wich boxes to choose

Answers

Answer:

C, D, F

Step-by-step explanation:

She walked 12 miles. Then she walked 1/4 that distance. "That distance" is 12 miles.

That means she walked 12 miles plus 1/4 of 12 miles.

She walked

12 + 1/4 * 12

You can factor out 12 from the expression above, and write it as

12(1 + 1/4)

Now you can do the addition in parentheses.

12(1 + 1/4) = 12(4/4 + 1/4) = 12(5/4)

Answer:

C, D, F

Answer:

12 + 1/4 x 12, 12 x 5/4, and 12 (1 + 1/4)

Step-by-step explanation:

To solve this, you need to add 1/4 of 12 to 12. 1/4 of 12 is 3, and 12 + 3 is 15. All of these equations are equal to 15, therefore they are all correct.

1/4 x 12 = 3 + 12 = 15

12 x 5/4 = 60/4 = 15

1 + 1/4 = 5/4

5/4 x 12 = 60/4 = 15

In which of the following situations would finding the surface area of an object be the most applicable?

Answers

Hi, you've asked an incomplete question. However, I provided a brief explanation about surface areas.

Explanation:

Surface area is a term commonly used in mathematics, and other branches of science, and it basically refers to a calculation of the total space that an object occupies.

For example, you can find the surface areas of a cuboid using the formula:

[tex]6s^{2}[/tex] where s= side length.

Please help I'm being timed ...
NO LINKS PLEASE

Answers

Answer:

I think you add them together

27 + 36 = 63

Step-by-step explanation:

HOPE THIS HELPS !!!!!!!!!!!!!!!!!

I Need Help Please!! (Geometry)

Answers

Answer:

3. 58°

4. 64°

5. 180°

Step-by-step explanation:

not completely sure bout number 5 but I think it's 180

3. 58
4. 64
5. 16 cm

Here’s what I could come up with

4. In ADEF, ZE is a right angle. If the side opposite ZD has a length of 17 and the length of the hypotenuse
is 26, which of the following is the value of ZD to the nearest degree?
(1) 33°
(3) 490
(2) 41°
(4) 57°

Answers

the answer would be 2, 41° i think

Question 4 (1 point)
Which list shows the correct order of coefficients needed to balance the chemical
equation?
_CH4 + __Cl2 → __CCl4 + _HCI

a 1, 4, 1, 2
b 1, 4, 1, 4
c 1, 2, 1, 4
d 1, 1, 1, 1

Answers

Answer:

d

Step-by-step explanation:

what's the value of given expression

[tex] \sqrt{33 \times 3 + 1} [/tex]
​

Answers

I believe it’s 10

Explanation : Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.

Emma bought a hat for $20. Emma increases the price by 25%. What is the price of the hat now?

Answers

Answer:

its $25

Step-by-step explanation:

Answer:

The hat is 25$ now

Step-by-step explanation:

25% of 20 is 5

5 + 20 = 25

Solve in +3 < 5.
Which graph shows the solutions?

Answers

C I believe am probably wrong but try

Please help i will give you the brainliest

Answers

Answer:

the first option.

Step-by-step explanation:

correct me if I'm wrong, I don't know if this is right, but that's a method I think you use

What is the distance, in feet, that the box has to travel to move from point A to point C?

Answers

Could u attach a photo ?

Can someone pls pls help me on this question !!!!!

Answers

Answer:

c. y= 0.5(2)^x

Step-by-step explanation:

i hope this helps :)

The store bought a pair of shoes for $50, and sold it for $80. What percentage was the markup?

Answers

Answer:

Step-by-step explanation:

profit=S.P.-C.P=80-50=30

Profit or percentage markup=30/50×100=60%

60% would be the correct answer.

four consecutive integer numbers that add up to 2. What are the numbers?? -HELP PLS

Answers

Answer:

-1, 0, 1, 2

Step-by-step explanation:

-1 + 0 + 1 + 2 = 2

Answer:

Step-by-step explanation:

-1,0,1,2

give me brainliest pls

in class 19%of the 25 students did not passed the test .how many students passed the test

Answers

Answer:

4

Step-by-step explanation:

Someone pls give me the answer?

Answers

Answer:

c

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

algebra x = 3, y=2x and z=3y , whats z?​

Answers

The answer is Z=18. 2x3=6 then 3x6=18

Which one is it ?

Parallelogram
Kite
Trapezoid
Rectangle
Rhombus
Square

Answers

Answer: Trapezoid
Explanation

Answer:

it will be trapeziod i hope it will be true

A backpack is sold to Target for $25. If Target marks the price of the backpack up by 40%, how much do they sell it for?

Answers

25 x 0.4 = 10 so $35

Answer:

40 percent is 10 so It cost 35.

Step-by-step explanation:

what is the height of the tree?​

Answers

Answer:

I would say 36 sorry i im wrong.

Step-by-step explanation:

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