MATHEMATICS HIGH SCHOOL

A researcher found that 55% of families in the United States have one child under the age of 21, 22% have two children under the age of 21, 15% have three children under the age of 21, 5% have 4 children under the age of 21and 3% have 5 or more children under the age of 21. If a family is selected at random, what is the probability the family has 1 or 3 children under the age of 21?

Answers

Answer 1

Answer:

67% or 0.67

Step-by-step explanation:

Given that:

P(1 child under age 21) = 55%

P(2 children under age 21) = 22%

P(3 children under age 21) = 15%

P(4 children under age 21) = 5%

P(5 or more children under age 21) = 3%

If a family is selected at random, what is the probability the family has 1 or 3 children under the age of 21?

P(1 or 3 children under age 21):

Either the selected family has 1 child under 21 years of age OR the selected family has 3 children under 21 years of age ;

P(1 child under age 21) + P(3 children under age 21)

= 55% + 15%

= 67% = 0.67

Related Questions

The cost to mail a one ounce letter was 39 cents and the cost to mail a two once letter was 63 cents. What is the ratio of the cost to mail a one ounce letter to the cost to mail a two ounce letter
You are traveling at 58 miles per hour in a 70 km per hour speed zone. How fast are you traveling in km per hour?
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What is the total amount that First Consumer Bank will receive after lending Jane $7,000 for three years at an interest rate of 5 percent, compounded annually?

Finance companies __________.Select one of the options below as your answer:a. make loans to consumers
b. are fairly small
c. make loans to businesses
d. all of the above

Answers

A finance company is a financial institution which is often affiliated with a holding company or manufacturer, that makes loans to individuals or businesses.
The best answer to the question then is letter c.make loans to businesses.

Whats the perimeter of a regular nonagon with an apothem of 17 cm and a side length of 12.4 cm.

Answers

Answer:

The perimeter of the regular nonagon is 111.6 cm

Step-by-step explanation:

In this question, we are asked to calculate the perimeter of a regular nonagon given the apothem and the length of its side

Since the polygon is regular, it means the length of its sides are equal.

The polygon we are dealing with here is a nonagon meaning it is a 9 sided polygon

Mathematically, the perimeter is ;

P =n * s

where n is the number of sides and a is the length of one of the side of the polygon

From the question, our s = 12.4 cm

Plugging this into the perimeter equation, we have;

P = 12.4 * 9 = 111.6 cm

Eric must pay off a loan of $3,500 in 5 years. Use the appropriate formula to find the amortization payment he would need to make each six months, at 12% interest compounded semiannually

Answers

Given:
Principal = 3,500
term = 5 years
interest rate = 12%
compounded semi-annually

A = P(1 + r/n)^nt

A = 3,500 (1 + 12%/2)²ˣ⁵
A = 3,500 (1 + 0.06)¹⁰
A = 3,500 (1.06)¹⁰
A = 3,500 (1.79)
A = 6,265

5 years * 2 = 10 semi-annual payments

6,265 / 10 = 626.50 amortization payment.

You owe some friends $25 and pay them back $18. Which number sentence shows this situation?25 + 18
-25 + 18
-18 + 25
-25 + (-18)

Answers

If you would like to know which number sentence shows the following situation, you can find this like this:

$25 - $18 = $7

You still owe your friends $7.
The correct result would be 25 - 18 = - 18 + 25.

Answer:

-18 + 25

Step-by-step explanation:

Which pattern could be used to create the sequence?400, -200, 100, -50, 25
a) Multiply the previous term by -2
b) Divide the previous term by -2
c) Subtract 600 from the previous term
d) Add -200 to the previous term

Answers

As you are given multiple choice, you can use trial and error with each of the answers. You can see that with each number the sign before it is reversed (so it goes even, odd , even , odd etc.) and the numbers are halved each time.
The answer is B) because you are dividing by 2 each time, and changing the sign before the number.

The answer would be b. It is b because if you do 400 divided by -2 is -200 and then you just keep dividing by -2

How to do this problem and the answer

Answers

Use a protractor to do the problem, but try finding th answer yourself

Hello,

The center angle (AOL) is 80° and the inscript angle (ANL) is the half: 80°/2=40°

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