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
Dvinal [7]
3 years ago
14

A study of consumer smoking habits includes A people in the 18-22 age bracket (B of whom smoke), C people in the 23-30 age brack

et (D of whom smoke), and E people in the 31-40 age bracket (F of whom smoke). If one person is randomly selected from this sample, find the probability of getting someone who is age 23-30 or smokes.
Mathematics
1 answer:
madreJ [45]3 years ago
4 0

The correct question is:

A study of consumer smoking habits includes 167 people in the 18-22 age bracket (59 of whom smoke), 148 people in the 23-30 age bracket (31 of whom smoke), and 85 people in the 31-40 age bracket (23 of whom smoke). If one person is randomly selected from this sample, find the probability of getting someone who is age 23-30 or smokes

Answer:

The probability of getting someone who is age 23-30 or smokes = 0.575

Step-by-step explanation:

We are given;

Number consumers of age 18 - 22 = 167

Number of consumers of ages 22 - 30 = 148

Number of consumers of ages 31 - 40 = 85

Thus,total number of consumers in the survey = 167 + 148 + 85 = 400

We are also given;

Number consumers of age 18 - 22 who smoke = 59

Number of consumers of ages 22 - 30 who smoke = 31

Number of consumers of ages 31 - 40 who smoke = 23

Total number of people who smoke = 59 + 31 + 23 = 113

Let event A = someone of age 23-30 and event B = someone who smokes. Thus;

P(A) = 148/400

P(B) = 113/400

P(A & B) = 31/400

Now, from addition rule in sets which is given by;

P(A or B) = P (A) + P (B) – P (A and B)

We can now solve the question.

Thus;

P(A or B) = (148/400) + (113/400) - (31/400)

P(A or B) = 230/400 = 0.575

You might be interested in
Maria deposited $5,700 in an account that earns 8% simple interest. Maria made no withdrawals or deposits. What will be the tota
denpristay [2]

Answer:

The total amount of money in Maria's account after 6 years is $8436

Step-by-step explanation:

Given;

principal amount , P = $5,700

interest rate, r = 8 % = 0.08

time of investment, t = 6 years

The interest on the invested money after 6 years is given by;

I = Prt

I = $5,700 x 0.08 x 6

I = $2736

Total amount in Maria's account is given by;

A = P + I

A = $5,700 + $2736

A = $8436

Therefore, the total amount of money in Maria's account after 6 years is $8436

3 0
2 years ago
What is 3/12 as a precent
kotegsom [21]

Answer: 25%

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Suppose that x is the probability that a randomly selected person is left handed. The value (1-x) is the probability that the pe
harina [27]

Answer:

The maximum variance is 250.

Step-by-step explanation:

Consider the provided function.

V(x)=1000x(1-x)

V(x)=1000x-1000x^2

Differentiate the above function as shown:

V'(x)=1000-2000x

The double derivative of the provided function is:

V''(x)=-2000

To find maximum variance set first derivative equal to 0.

1000-2000x=0

x=\frac{1}{2}

The double derivative of the function at x=\frac{1}{2} is less than 0.

Therefore, x=\frac{1}{2} is a point of maximum.

Thus the maximum variance is:

V(x)=1000(\frac{1}{2})-1000{\frac{1}{2}}^2

V(x)=250

Hence, the maximum variance is 250.

4 0
3 years ago
Vcvvvv
VARVARA [1.3K]

I'm not sure Google it tho might help

5 0
2 years ago
What is 3x3x8x<br><br> help it’s so hard pls
Vesna [10]
72 if your needing to times them
8 0
3 years ago
Other questions:
  • Ribbon ones are made from strips of ribbon tied to sticks Connie has 84 feet of red ribbon 48 feet of blue ribbon and 72 feet of
    14·1 answer
  • Part A: If (2^6)^x = 1, what is the value of x? Explain your answer. (5 points)
    12·1 answer
  • A manufacturer allows a discount of 30% on the list of prices of goods bougth by wholesalers. Calculate the discount allowed on
    10·1 answer
  • Find the missing side
    10·2 answers
  • A company manufactures tires at a cost of $40 each. The following are probabilities of defective tires in a given production run
    10·1 answer
  • Rewrite the expression by combining like terms. 3y + 5x2 + 10x + 2x2 + 15x – 3y​
    9·1 answer
  • It's timed plzzz help!!!!!!!!!!!!!!
    14·2 answers
  • EAZYYYYYYYYYYYY POINTSSSSSSSSSSSSSS<br> I make two people out of one. What am I?
    7·2 answers
  • Help me i need this question fast
    9·2 answers
  • Find the perimeter and the area of the polygon with the given vertices (0,2),(5,2),(5,5),(0,5)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!