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
Anestetic [448]
3 years ago
13

The odds of choosing one black ball from an urn are 7 to 13. what is the probability of getting a black ball?

Mathematics
2 answers:
TEA [102]3 years ago
7 0

Answer: \dfrac{7}{20}

Step-by-step explanation:

The odds for an event is basically the ratio of the favorable outcomes to the unfavorable outcomes.

Given : The odds of choosing one black ball from an urn are 7 to 13.

i.e. favorable outcomes for getting black ball = 7

i.e.  unfavorable outcomes for getting black ball = 13

Now , Total outcomes = favorable outcomes+  unfavorable outcomes

=7+13=20

Then, the probability of getting a black ball =\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}

=\dfrac{7}{20}

Hence, the required probability =\dfrac{7}{20}

ycow [4]3 years ago
4 0
I think the answer is 7/13.
Hope this helps.
You might be interested in
Which equation can be used to solve 3/5 divided by 7/10
Jlenok [28]

Answer:

35/50

Step-by-step explanation:

Here we will show you how to calculate 3/5 divided by 7/10. We will give you the answer in fraction form and in decimal form.

Here is 3/5 divided by 7/10 displayed

3/5 ÷ 7/10

The numbers in 3/5 divided by 7/10 are labeled below:

3 = dividend numerator

5 = dividend denominator

7 = divisor numerator

10 = divisor denominator

To make it a fraction form answer, you multiply the dividend numerator by the divisor denominator to make a new numerator.

Furthermore, you multiply the dividend denominator by the divisor numerator to make a new denominator:

3 x 10/5 x 7 = 30/35

Thus, the answer to 3/5 divided by 7/10 in fraction form is:

30/50

7 0
3 years ago
What is –2 5/12 written as a decimal?​
Katarina [22]
It’s a number it’s a number it’s a n
8 0
3 years ago
purchased a DVD player on sale. The original selling price was ​$154.30. The sale price was ​$128.02. What is the first step in
Leya [2.2K]

Answer:

There was a markdown of $26.28 which is 20.53% off the original asking price.

Hope this helps and PLEASE MARK BRAINLIEST!

Thank you!!

3 0
3 years ago
"A laboratory tested 73 chicken eggs and found that the mean amount of cholesterol was 230 milligrams with LaTeX: \sigmaσ = 17.4
Scrat [10]

Answer:

The 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is between 226.01 and 233.99 milligrams.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96*\frac{17.4}{\sqrt{73}} = 3.99

The lower end of the interval is the sample mean subtracted by M. So it is 230 - 3.99 = 226.01

The upper end of the interval is the sample mean added to M. So it is 230 + 3.99 = 233.99.

The 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is between 226.01 and 233.99 milligrams.

4 0
3 years ago
Mary has $267 in her checking account. She writes three checks for $33; $65 and $112. What is the balance in her account now? Yo
Tamiku [17]

Answer:$57

Step-by-step explanation:

$267-$33=$234

$234-$65=$169

$169-$112=$57

5 0
3 years ago
Other questions:
  • The measure of one side of a square is (s + 3) inches long.Writes two different equivalent expressions that represent the perime
    5·1 answer
  • Which shows the image of ΔRST after the rotation (x, y) → (y, –x)? On a coordinate plane, a triangle has points R (negative 2, 1
    8·2 answers
  • Mr B earned money over the summer working at his family's store. He put
    8·1 answer
  • Solve for x in the following equation.
    12·1 answer
  • What is x(-14x + 9)?
    10·1 answer
  • 18 cm distance on map<br> 120 m distance in real life <br> Scale
    7·1 answer
  • WILL GIVE A BRAINLIEST!!
    14·2 answers
  • The diagram below shows some measurements taken from a new bridge. How long is the bridge?
    9·1 answer
  • Tip is calculated on the subtotal of a bill true or false ?
    8·1 answer
  • The probability that a randomly chosen person has a dog is 0.34. The probability that a randomly chosen person will have a dog a
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!