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
Assoli18 [71]
3 years ago
12

What’s the correct answer for this?

Mathematics
1 answer:
slava [35]3 years ago
7 0

Answer:

1/4

Step-by-step explanation:

Let's denote the probabilities as following:

Probability that a teenager has a sister:

P(A) = 12/28

Probability that a teenager has a brother:

P(B) = 7/28

Probability that a teenager has both a sister and a brother:

P(A⋂B) = 3/28

Probability that a selected teenager has a sister also has a brother, or in other words, he/she has a brother, given he/she had a sister:

P(B|A)

Let's apply the formula of conditional probability to work out P(B|A)

P(B|A) = P(A⋂B)/P(A) = (3/28)/(12/28) = (3*28)/(12*28) = 3/12 = 1/4

=> Option C is correct

Hope this helps!

You might be interested in
PLEASE HELP WILL MARK BRAINLIEST!!!!
podryga [215]
Last Choice is the answer
7 0
2 years ago
Eqation for half of the difference of 25 and 7
romanna [79]

Answer:

25-7 / 2

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Add the following:
PIT_PIT [208]

Step-by-step explanation:

1) 7/23 + 11/23 + 9/23

7+11+9/23

27/23

= 1 4/23

2) 2 5/7 + 9 4/7

11 9/7

= 11.12

3) 9/20 + 3/5

9+12/20

21/20

= 1 1/20 or 1.05

8 0
3 years ago
Anyone PLEASE help!!! I will give brianliest
Pani-rosa [81]

Answer:

its the second one.

Step-by-step explanation:

7 0
3 years ago
Cindy has printed 45 pages. Each page has 18 stickers
prisoha [69]

Answer:

810 stickers.

Step-by-step explanation:

Since there are 18 stickers per page, we need to use multiplication to calulate how many stickers we have total.

Our problem is 45*18, since we have 45 pages, each with 18 stickers.

45*18=810

Cindy has 810 stickers in all.

Hope this helps!

4 0
3 years ago
Read 2 more answers
Other questions:
  • True or false? 5 2/3 and 3/17 are reciprocal numbers.
    11·2 answers
  • Find m∠LKE. m∠LKJ = 150° m∠LKE = (x + 32)° m∠EKJ = (x + 94)° A) 40° B) 44° C) 46° Eliminate D) 48°
    6·2 answers
  • Which image shows the correct position of -2 1/2on the number line?
    14·1 answer
  • X(21)+x(4)=300 I need solving
    15·1 answer
  • Rodney buys 6 pounds of bananas for 5.10$. how much do bananas cost?
    12·1 answer
  • I need the answer asap .! help please !
    11·1 answer
  • I need 1 more credit to pass my class! Please Help! <br> I will give brainliest If your right.
    9·1 answer
  • Ben is taking a typing class, and the following line graph represents the number of words per minute he was able to type each we
    15·1 answer
  • Not sure how I would go about solving this problem. Any help would be appreciated
    9·1 answer
  • ILL MARK BRAINIEST IF YOU CAN DO THIS RIGHT!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!