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
Orlov [11]
3 years ago
13

the probability that a twelve year old has a brother or sister is 25%. suppose you survey 300 twelve year olds. about how many d

o you think will have a brother or sister?
Mathematics
1 answer:
Genrish500 [490]3 years ago
3 0

Answer:

n(B U S) = 75

Step-by-step explanation:

Explanation:-

<u>Probability</u>:-

P(E) = \frac{number of elements events in E}{total number of elementary events in the random experiment}

P(E) = \frac{m}{n}

Let 'B' be the event of having twelve year old brother

Let 'S' be the event of having twelve year old sister

given data  P(BUS) = 0.25

given total survey  n(survey) = 300

we have to find the value is n(BUS) =?

we will use probability definition we get, P( BUS) =\frac{n(BUS)}{n(survey)}

substitute given values, we will get solution

0.25 = \frac{n(BUS)}{300}

after cross multiplication , we get

n(BUS) = 0.25 X 300

n(BUS) = 75

<u></u>

You might be interested in
Please help i really need it, i will give brainliest to the right answers
scZoUnD [109]

Answer:

1. 5

2. 1.29

3. 9.90

Step-by-step explanation:

They are buying 5 of each thing, so multiply it by 5.

The diced tomatoes cost $1.29.

When you solve the equation, you get 9.9. Convert that to money, and you have $9.90

7 0
3 years ago
8(-14)/[(-8)-3(-13)]
Nadusha1986 [10]

Hey there!

\bold{\frac{8(-14)}{(-8)-3(-13)}}

  • \bold{8\times-14=-112}
  • \bold{\frac{-112}{(-8)-3(-13)}}
  • \bold{3\times-13=39}
  • \bold{\frac{-112}{-8-39} }
  • \bold{-8-(-39)=31}
  • \boxed{\boxed{\bold{Answer:\frac{-112}{31}}}}

Good luck on your assignment and enjoy your day!

~\bold{LoveYourselfFirst:)}

7 0
3 years ago
please let us to do with it and it was the only one that I can get the best way for you and I am a bit more than one person who
Lelechka [254]
Inside, Lighthouse, Overboard (If You Can go Diagonal) Outback, Outdoors
Hope that helps :)
8 0
3 years ago
Please if you do both I will give brainiest (to the first one to answer)
Firlakuza [10]

Answer:

X is rational

y=irrational

y is greater

Step-by-step explanation:

-3.4 can be written as-34/10

8 0
2 years ago
Read 2 more answers
It's going to be Lindsay's birthday soon, and her friends Sandy, Jay, and Hakeem have contributed equal amounts of money to buy
avanturin [10]
Each individual contributed $x
3x=$19.50
x=$6.50
Each friend contributed $6.50
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the vertex of g(x)=8x^2-64x
    8·2 answers
  • How do you do integers
    5·1 answer
  • Select the equation of the line that passes through the point (5, 7) and is perpendicular to the line x = 4.
    5·1 answer
  • REALLY NEED HELP!!!<br> see picture*****
    8·1 answer
  • Please help ASAP on #4,6 please I'll give you brainliest​
    8·1 answer
  • A manufacturer ships its products in boxes with edges of 4 inches. If 12 boxes are put in a carton and completely fill the carto
    15·1 answer
  • I need help finding the answer
    8·1 answer
  • Make x the subject of the formula
    5·1 answer
  • Solve 3[-x + (2x+ 1)] =X- 1.<br> x= ?
    7·1 answer
  • -x + 3y = -23<br> -8x - 3y = -22<br> using elimination
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!