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
Monica [59]
3 years ago
10

Find the probability that when a couple has three children, at least one of themis a girl. (Assume that boys and girls are equal

ly likely.)
Mathematics
1 answer:
kvv77 [185]3 years ago
6 0

Answer:   \bold{\dfrac{7}{8}=87.5\%}

<u>Step-by-step explanation:</u>

"At least one girl" means P(1 girl) + P(2 girls) + P(3 girls)   or   1 - P(all boys)

I will use the latter: 1 - P(all boys)

P(all boys) = \dfrac{1}{2}\times \dfrac{1}{2}\times \dfrac{1}{2}=\dfrac{1}{8}

1 - P(all\ boys) \quad = \quad 1-\dfrac{1}{8}\quad =\large\boxed{\dfrac{7}{8}}

You might be interested in
A novel is 11/16 inch thick. If there are two shelves, each 99 inches wide, how many novels will be able to fit on the two shelv
34kurt
First let's just combine the shelves to make it easier. 99 + 99 = 198.

We can simply divide 198 by 11/16 to get the answer. First let's convert 11/16 to a decimal.

11 divided by 16 is 0.6875

So 198 divided by 0.6875 is 288.

288 novels can fit on both the shelves.
8 0
3 years ago
Chan deposited money into his retirement account that is compounded annually at an interest rate of 7%. Chan thought the equival
dedylja [7]

Answer:

No, equivalent quarterly rate will be approx 1.75%

Step-by-step explanation:

Given that Chan deposited money into his retirement account that is compounded annually at an interest rate of 7%.

We know that there are 4 quarters in 1 year.

So to find that equivalent quarterly we will divide given yearly rate by number of quarters.

That means divide 7% by 4.

which gives 1.75%.

But that is different than Chan's though of 2% quarterly interest.

Hence Chan is wrong.

4 0
3 years ago
I NEED HELP WITH THIS PICTURE IS PROVIDED
RideAnS [48]
Is this an exam? Nehshdgdsusu
7 0
3 years ago
I need help with this !!
zubka84 [21]

Answer:

is there more to the problem

5 0
3 years ago
Martha took her family out to dinner. Their total bill was $32.58. She decided to leave their server a 20% tip. How much did Mar
MrMuchimi
$32.58 x 20% (0.2) = 6.156
Just round it and you get $6.16
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the area of the trapazoid
    15·2 answers
  • What household items weigh 100 grams?
    7·1 answer
  • I just need to get my homework done because it is 8:00
    5·2 answers
  • F(x)=x^(2)-4x+32 is it true that it equals (0,32) on the y-intercept
    15·2 answers
  • PLS HELP!!! WILL MARK BRAINLIEST <br> Solve for x and/or y:
    8·2 answers
  • ` 156 weeks = ________ years help
    9·1 answer
  • Help fast timed hurry please ​
    15·1 answer
  • 3. In 2008, the population of the United States
    9·1 answer
  • Given the cosine equation y = 2cos(4x) - 1, What is the midline?
    11·1 answer
  • Keisha wants to buy a stereo. Her mother said if Keisha saved 75% of the cost of the stereo, she would pay the other 25% and the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!