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
lubasha [3.4K]
3 years ago
5

A box contains 3 black pens, 7 blue pens, and 5 red pens. She pulls a red pen, puts it back, pulls a blue pen, puts it back, and

then pulls a black pen and uses it. P(red, then blue, then black)
Mathematics
1 answer:
saveliy_v [14]3 years ago
4 0

Answer:

7/25

Step-by-step explanation:

Probability is the likelihood or chance that an event will occur.

Probability = expected outcome/total outcome

If the box contains 3 black pens, 7 blue pens, and 5 red pens, the total number of pens in the box is 3+7+5 = 15pens

Probability of pulling a red pen and replacing = 5/15 = 1/3

Probability of pulling a blue pen and replacing = 7/15

Probability of pulling a black pen and not replacing(using it) = 3/15

{Note that the total number of outcome used will still be 15 since the black pen was pulled out last even though it wasn't replaced.}

P(red, then blue, then black) = 1/3×7/15×3/15

= 63/225

= 7/25

You might be interested in
I really need help with this my deadline is very soon​
Harman [31]

Answer:

(3)\ y = -x

(5)\ y = -3x -2

Step-by-step explanation:

Required

The equation in slope intercept form

Solving (3):

m = -1

(x_1,y_1) =(4,-4)

The equation in slope intercept form is:

y = m(x - x_1) + y_1

This gives:

y = -1(x - 4) -4

Expand

y = -x + 4 -4

y = -x

Solving (5):

m = -3

(x_1,y_1) = (1,-5)

The equation in slope intercept form is:

y = m(x - x_1) + y_1

This gives:

y = -3(x - 1) - 5

Expand

y = -3x + 3 - 5

y = -3x -2

8 0
2 years ago
X/-6-8&gt; -12<br><br> PLEASE HELP AND SOLVE
Daniel [21]

Answer:

24

Step-by-step explanation:

Solve for x by simplifying both sides of the equation, then isolating the variable.

x=24

3 0
2 years ago
Read 2 more answers
3) Last year Kerry’s take home pay was £15 000 She spent 40% of her take home pay on rent. She used the rest of her take home pa
gregori [183]
3,000. You take 15,000 and multiply by .4 to get how much she spent on rent (6,000). They you subtract the rent money from her total pay to get her money that she spent on living expenses, clothes and entertainment in total (9,000). Since she spent her money in six parts (3+2+1), you divide 9,000 by 6 to get 1,500 to get each part. Since for entertainment she has two parts you multiply 1,500 by 2 to get 3,000.
4 0
3 years ago
Solve the subtraction equation one half minus three sevenths equals blank. Use multiplication to create equivalent fractions.
serg [7]

Answer:

b

Step-by-step explanation

4 0
2 years ago
Read 2 more answers
Solve x2 – 8x + 15 &lt; 0.
rusak2 [61]
X2 - 8x + 15 = 0
(x  - 3)(x - 5) = 0
critical points are at 3 and 5
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is 3 1/2 + 2 1/3
    10·2 answers
  • A circle is inscribed inside a square as shown. If graphed on the coordinate plane, the coordinates of the center of the circle
    8·2 answers
  • The drama club is printing t-shirts for its members. The printing company charges a certain amount for each shirt plus a setup f
    11·1 answer
  • Four and one-half minus three and five-eighths
    12·1 answer
  • Anyone know how to solve this?
    9·1 answer
  • Does anyone know this?
    15·1 answer
  • What are two factors of 24 that add to be 10? separate each factor by a comma
    9·1 answer
  • Help me please. Show a lil work please.......
    11·2 answers
  • The figure represents a design for a stained glass window. The window is divided by cords MN and ST. What is the value of x
    10·1 answer
  • An observational study found that the amount of time a child spends learning a second language is associated with standardized t
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!