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egoroff_w [7]
3 years ago
10

In a class of 25 students, 14 have a brother and 17 have a sister. There are 5 students who do not have any siblings. What is th

e probability that a student who has a brother also has a sister?

Mathematics
2 answers:
cricket20 [7]3 years ago
5 0

Answer: 11

Students have both a brother and a sister

Step-by-step explanation:

I don't think probability should be used for this question because the answer is quite clear

So in a class of 25 students

5 students don't have a sibling

So 25-5=20

Total number of siblings=14+17=31 siblings in total

So 20 people have 31 siblings

31-20=11

So the answer should be 11

AnnZ [28]3 years ago
3 0

Answer:

11/14

Step-by-step explanation:

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How to solve this inequality -8×+18>-22
Ksju [112]

Answer:

x < 5

Step-by-step explanation:

<u>Step 1:  Solve for x</u>

-8x + 18 > -22

-8x + 18 - 18 > -22 - 18

-8x / -8 > -40 / -8

<em><u>When dividing by negative, it flips the sign</u></em>

x < 5

Answer: x < 5

4 0
3 years ago
I need help plz you leave you house at 1 p.m to go to a wedding. The ceremony starts at 5 p.m. and is 350 miles away. You drive
3241004551 [841]
You leave at 1 P.M., the wedding ceremony starts at 5 P.M.

This gives you a 4 hour gap, the Wedding is 350 miles away, and you're traveling at 65 miles an hour.

Simply you can use two methods, (65 * 4) to verify if you'd make it or not or (350/65) to ensure how many hours it would take in total.

65 * 4 = 260 | Since this is not 350, we can verify that you'd be late.
350/65 = 5.4 (estimated) | Meaning it'd take about 5.4 hours.

To know how long that is we'd have to convert over.

5.4 = 5 2/5ths, 60 minutes are in an hour. Divide 60 by 5 to get 12, meaning:
1/5ths = 12/60ths, with that said multiply that by 2 to get your answer.
2/5ths = 24/60ths or 24 minutes.

This means you'd take 5 hours and 24 minutes to get there.

Originally we stated that the process would take 4 hours. Subtract:

(5 hours and 24 minutes) - (4 hours) = (1 hour and 24 minutes)

Concluding that you'd be late by an hour and 24 minutes.

I hope this helps, have a great rest of your day! ^ ^
| | Ghostgate | |
4 0
3 years ago
Please show work and be done soon
stich3 [128]

9514 1404 393

Answer:

  x = 22.5°

Step-by-step explanation:

Angle BED ≅ angle EBC = 6x, so angle BEA = 4x. The angles FEB and BEA form a linear pair, so we have ...

  4x +4x = 180°

  x = 22.5° . . . . . . divide by 8

_____

BED and EBC are "alternate interior angles" with respect to transversal BE crossing parallel lines DE and AC.

8 0
3 years ago
What is the solution to the inequality 5.25 -b &gt;6.5?
Anarel [89]

Answer:

Test is cheating asking on brainly

Step-by-step explanation:

d = 53

\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]  \lim_{n \to \infty} a_n

4 0
3 years ago
A student uses a solution that contains 16 grams of water to conduct an evaporation experiment. ​​At the end of one hour, the am
yanalaym [24]

Answer:

3.5% decrease means 96.5% remaining

0.965(16)

4.25% decrease means 95.75% remaining

0.9575(0.965(16))

= 14.7838 grams

5 0
3 years ago
Read 2 more answers
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