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
xxMikexx [17]
2 years ago
10

Fiona has a box with 5 red buttons and 9 blue buttons.She randomly selected one button, took it out of the box, then selected an

other button.What is the probability that both buttons are red?
A.4/25
B.10/91
C.9/29
D.1/3
Mathematics
1 answer:
leonid [27]2 years ago
7 0

Answer:

B. 10/91

Step-by-step explanation:

Box has 5 red buttons and 9 blue buttons.

We add 5 and 9 to get the total buttons.

5 + 9 = 14

Then, we find the probability for a red button.

5/14 = .35

Now, that we've taken out 1 button.

The amount of buttons available changes.

14 - 1 = 13

There are 4 red buttons remaining.

The probability for a red button changes to 4/13.

4/13 = .30

Then, we multiply both probabilities.

.30 x .35 = .111

Convert to a fraction.

.111 = 10/91

Thus it would be B.

You might be interested in
The time taken to prepare the envelopes to mail a weekly report to all executives in a company has a normal distribution, with a
telo118 [61]

Answer:

Mailing preparation takes 38.29 min max time to prepare the mails.

Step-by-step explanation:

Given:

Mean:35 min

standard deviation:2 min

and 95%  confidence interval.

To Find:

In normal distribution mailing preparation time  taken less than.

i.eP(t<x)=?

Solution:

Here t -time and x -required time

mean time 35 min

5 % will not have true mean value . with 95 % confidence.

Question is asked as ,preparation takes less than  time means what is max time that preparation will take to prepare mails.

No mail take more time than that time .

by Z-score or by confidence interval is

Z=(X-mean)/standard deviation.

Z=1.96 at  95 % confidence interval.

1.96=(X-35)/2

3.92=(x-35)

X=38.29 min

or

Confidence interval =35±Z*standard deviation

=35±1.96*2

=35±3.92

=38.29 or 31.71 min

But we require the max time i.e 38.29 min

And by observation we can also conclude the max time from options as 38.29 min.

4 0
3 years ago
Please help with this
tresset_1 [31]

Respuesta:839202829 :VVV

5 0
2 years ago
This is an easy question but it’s kind of stumping me, please help!!
Kryger [21]

Answer:

-3/2

Step-by-step explanation:

Remeber, to find slope we use this formula:

y - y all over x - x, or (y-y) / (x-x)

(6-9) / (5-3)

-3 / 2

= -3/2

6 0
3 years ago
Read 2 more answers
Solve this equation zma=a+b ;for a
mina [271]
Subtract b and then a = (zma) - b
5 0
3 years ago
Help would be appreciated​
Vesnalui [34]

Answer:

<u>5x+10</u>

27x

Step-by-step explanation:

cross multiply

4 0
3 years ago
Other questions:
  • If g(x ) = 3x + 1, evaluate g(-14). -5 -10 -41
    9·2 answers
  • Use the Distributive Property to multiply. 9(4m + 1) A. 36m + 9 B. 45m C. 36m + 1 D. 13m + 9
    14·1 answer
  • How do you do number 34
    9·1 answer
  • A piece of wire 45cm long is bent to form a triangle. if the sides of the triangle are in the ratio 3:2:4, find the length of th
    14·1 answer
  • Two cities on a map is 7.5 centimeters.The map is 1 centimeter represents 30 kilometers.What is the distance between the cities
    15·1 answer
  • Find x if the mean of the number is 13 ,2x,0,5x,11 and 9
    8·1 answer
  • Find two consecutive odd numbers whose sum is 44.
    11·1 answer
  • Solve the inequality. 2(4x – 3)-3(3x) + + 5x?​
    14·1 answer
  • Solve x^3 = 125/27.
    15·1 answer
  • Help I offer all of my points
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!