1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kipiarov [429]
3 years ago
13

3. A bag has five blue marbles, seven red marbles and nine green marbles. Three marbles are drawn

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
7 0

Answer:

The probability is 9/266

Step-by-step explanation:

The first thing to do here is get the total number of marbles = 5 + 7 + 9 = 21 marbles

Now we are drawing the marbles without replacement, this means once a marble is drawn there is a decrease in the total number of marbles left.

The probability of drawing a green marble initially = number of green marbles/ total

number of marbles = 9/21 = 3/7

Now, we want to draw a blue marble

There are 5 blue marbles and we have already drawn one marble from the total. So the probability of drawing a blue marble would be 5/20 = 1/4

And lastly, another green marble

That would make 6 green marbles left and a total of just 19 left. So the probability at this point for green marbles = 6/19

Having and in probability means we multiply all

So this means the probability we are calculating is; 3/7 * 1/4 * 6/19 = 18/(28 * 19) = 9/(14 * 19) = 9/266

You might be interested in
11.1.30<br> How many three-digit even numbers are possible if the leftmost digit cannot be zero?
Ann [662]

The total number of 3 digit even numbers is 450

Step-by-step explanation:

Step 1 :

We need to determine the  number of 3 digit numbers which is even and the leftmost digit is not zero .

The  3 digits with left most digit not equal to zero starts from 100 and goes up to 998

If we consider only the even 3 digit numbers in this interval, this would form an arithmetic progression with the first number a = 100 and the common difference d = 2.

Step 2:

The last number l  in this series is 998 .

So we have

a = 100

l = 998

d = 2

The nth term in the arithmetic progression is given by a + (n-1) d

so substituting the above values we get

100 + (n-1) 2 = 998

2n = 900  => n = 450

Step 3 :

Answer :

The total number of 3 digit even numbers is 450

4 0
3 years ago
A landscape business charges $50 to deliver rocks. The cost of the rocks are $27 per cubic yard. write and solve a linear equati
Nuetrik [128]
<h2>Answer: 27x + 50 = y, $266</h2>

Step-by-step explanation:

First, let's form a linear equation that will help us find out how much that will cost.

Let's set x = the cubic yards of rocks delivered and y = total cost.

First, we know that the business charges 27 dollars for every x that you buy. That can be shown with a multiplication expression:

27x

Next, we know that the business charges a fixed fee of $50 for their services. This fee would be <em>added on</em> to the amount that they charge for the rocks that you buy.

<h2>27x + 50 = y</h2>

That's our linear expression! Next, we need to find out the <em>total cost</em>, y, when you need 8 cubic yards of rocks delivered, x.

To solve this, we need to substitute values for at least one of our variables.

Since 8 describes the cubic yards of rocks delivered, we can substitute 8 for x.

But we don't know y, the total cost- that's what we're solving for! In other words, we're solving for y.

Let's just substitute in what we know:

27(8) + 50 = y.

216 + 50 = y

<h2>y = 266</h2>

So, we know that it would cost $266 dollars to have 8 cubic yards of rocks delivered to a site.

By the way, you can also graph your linear equation to find the corresponding y-value to 8 as another way to solve your problem.

7 0
3 years ago
Sam and Rachel both walk dogs in their neighborhood. Sam charges $15 per walk, plus
bija089 [108]

Answer:

Call of duty. warzone=free

Step-by-step explanation:

you go ps store, you search warzone you click download then you wait how many hours. Then you play! And you dont answer this question :) :)

4 0
3 years ago
Guess how old I am. hints: I'm not really in college, I'm in Middle School. When you find out my age you are in for a shock for
babunello [35]
Maybe 11 years old??
4 0
2 years ago
What is 23/6 as a mixed number?
saveliy_v [14]
23/6 as a mixed fraction is 3(5/6)
7 0
3 years ago
Read 2 more answers
Other questions:
  • NEED HELP ASAP<br><br>(5,-17), (-6,3) <br><br> find the slope
    15·1 answer
  • Is 6/10 larger than 9/15?
    7·1 answer
  • I WILL MAKe yoU BRAINLIEST I NEED HELP ASAP!!!
    9·2 answers
  • Draw place value disks and arrows to represent each product
    11·2 answers
  • If 5 dogs share equally a bag of dog treats, each dog gets 24 treats. Suppose 8 dogs share the bag of treats equally. How many t
    8·2 answers
  • 8(-b-4) what is it help
    8·1 answer
  • HELP! WILL GIVE BRANLIEST!!!
    11·2 answers
  • Help anyone please help homie anyone god lord
    10·1 answer
  • Find the slope between the points (−3,−5) and (10,-5)
    5·2 answers
  • If 100 grams of water evaporated into a gas, how much mass will the gas have?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!