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
Nezavi [6.7K]
1 year ago
13

a couple has three children. assuming each child has an equal chance of being a boy or a girl, what is the probability that they

have at least one girl? a. 1 b. .125 c. .5 d. .875
Mathematics
1 answer:
yaroslaw [1]1 year ago
3 0

Answer:

d. 0.875

Step-by-step explanation:

Having at least 1 girl out of 3 children means that there can be 1, 2 or 3 girls out of the 3 children.

So having at lest 1 girl out of 3 children is the same as saying that all 3 children are not boys.

The probability that all 3 children are boys would be

chance that child 1 is a boy * chance that child 2 is a boy * chance that child 3 is a boy = 0.5 * 0.5 * 0.5 = 0.125

And the probability that NOT all 3 children are boys would be

100% - probability that all 3 children are boys = 1 - 0.125 = 0.875

You might be interested in
Sophia bought a large cake and cut it into fifteen slices for her birthday her friends ate 2/3 of the cake how many pieces of th
lina2011 [118]
2/3 of the cake would be  2/3 of 15 slices, or 10 slices.  

This leaves (15 slices - 10 slices), or 5 slices.
6 0
3 years ago
The ratio of cats and dogs at the animal shelter is 4 to 5. How many cats could there be? How many dogs? Write six different ans
garik1379 [7]

Answer:

8 cats 10 dogs, 12 cats 15 dogs, 16 cats 20 dogs, 20 cats 25 dogs, 24 cats 30 dogs

Step-by-step explanation:

3 0
3 years ago
16. How much money will I need to have at retirement so I can withdraw $60,000 a year for 20 years from an account earning 8% co
Lady_Fox [76]

Answer:

  • starting balance: $636,215.95
  • total withdrawals: $1,200,000
  • interest withdrawn: $563,784.05

Step-by-step explanation:

a) If we assume the annual withdrawals are at the beginning of the year, we can use the formula for an annuity due to compute the necessary savings.

The principal P that must be invested at rate r for n annual withdrawals of amount A is ...

  P = A(1+r)(1 -(1 +r)^-n)/r

  P = $60,000(1.08)(1 -1.08^-20)/0.08 = $636,215.95

__

b) 20 withdrawals of $60,000 each total ...

  20×$60,000 = $1,200,000

__

c) The excess over the amount deposited is interest:

  $1,200,000 -636,215.95 = $563,784.05

4 0
3 years ago
Leslie has $30 to spend at an amusement park. She spent $9 on snacks. She wants to ride a roller coaster that costs $1.25 per ri
DiKsa [7]

Answer:

d is a answer there arer no more

Step-by-step explanation:

she can ride 14 rides

6 0
3 years ago
30 inches in centimetres
aleksley [76]

Answer:

76.2 cm

Step-by-step explanation:

If you convert, said inches, it wouldn't be an exact number, but it would equal 76.2.

3 0
3 years ago
Other questions:
  • Which of the following graphs represents the equation below? f(x) = x^2 + 4x
    14·1 answer
  • The top of a ladder slides down a vertical wall at a rate of 0.15 m/sec. at the moment when the bottom of the ladder is 3 m from
    11·1 answer
  • F(x){2} =9x^{3}+x^{2} -5x+4 and g(x)^{2} =5x^{3} -7x+4 what is f(x)-g(x)
    11·1 answer
  • Martin charges $10 for every 5 bags of leaves he rakes. Last weekend, he raked 23 bags of leaves. How much money did he earn?
    13·2 answers
  • Find the surface area of polyhedra <br>Pls!! show how you got the surface area ​​
    11·1 answer
  • If y = k where k is a constant and y =24 when x =6 what is the value of y when x= 5
    11·1 answer
  • A company that produces lawn chairs uses market surveys and linear regression to develop a demand function based on the wholesal
    14·1 answer
  • PLEASE HELP FAST I NEED THIS QUICKLY
    12·2 answers
  • This question is worth 2 points! Allison makes and sells beaded necklaces. She charges a flat fee of $5 per necklace, and $1.50
    5·1 answer
  • Find the coordinate of the midpoint of the segment with the given endpoints.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!