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
Kay [80]
2 years ago
14

At the beginning of a certain study of a group of persons, 15% were classified as heavy smokers, 30% as light smokers, and 55% a

s nonsmokers. In the five-year study, it was determined that the death rates of the heavy and light smokers were five and three times that of the nonsmokers, respectively. A randomly selected participant died over the five-year period: calculate the probability that the participant was a nonsmoker.
Mathematics
1 answer:
ra1l [238]2 years ago
3 0

The probability that the participant was a nonsmoker is 25%.

<h3><u>Probability</u> </h3>

Given that at the beginning of a certain study of a group of persons, 15% were classified as heavy smokers, 30% as light smokers, and 55% as nonsmokers, and in the five-year study, it was determined that the death rates of the heavy and light smokers were five and three times that of the nonsmokers, respectively, to calculate, if a randomly selected participant died over the five-year period, the probability that the participant was a nonsmoker, the following calculation must be performed:

  • 15 x 5 = 75
  • 30 x 3 = 90
  • 55 = 55
  • 55 + 90 + 75 = 220
  • 220 = 100
  • 55 = X
  • 55 x 100 / 220 = x
  • 5500 / 220 = X
  • 25 = X

Therefore, the probability that the participant was a nonsmoker is 25%.

Learn more about probability in brainly.com/question/26684125

You might be interested in
FIRST RIGHT ANSWER GETS BRAINLLEST If you spin the spinner below 20 times, which of the following outcomes are reasonable? Selec
erik [133]

Answer:

B) Lands on red 6 times

C) Lands on yellow 4 times

Step-by-step explanation:

The rest are way too much/too little for their predicted probability.

7 0
4 years ago
Read 2 more answers
Twice the sum of a number and 3 is 20.
tamaranim1 [39]

Answer:

true

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Find the rate of increase:<br> Original amount: $2000<br> Final amount: $3000
Genrish500 [490]

Answer:

21

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
I need helpppp (10 points )
irga5000 [103]

Answer:  The flagpole is about 22.3 feet tall.

This is roughly the size of a two story building, assuming each floor is 10 feet or so.

Since this height is under 25 ft, this flagpole is in compliance with the regulation.

=====================================================

Work Shown:

The horizontal leg of the triangle is 36 ft. This is the adjacent leg to the reference angle 25 degrees.

The vertical leg of the triangle is x-5.5, and this leg is the opposite side to the reference angle 25 degrees.

Use the tangent rule to connect the opposite and adjacent sides.

Solve for x.

tan(angle) = opposite/adjacent

tan(25) = (x-5.5)/36

36*tan(25) = x-5.5

x-5.5 = 36*tan(25)

x = 36*tan(25)+5.5

x = 22.28707569358

x = 22.3 ft is the approximate height of the flagpole

Make sure your calculator is in degree mode.

The height is not over 25 ft, so this flagpole meets the requirements.

4 0
3 years ago
The function​ s(t) represents the position of an object at time t moving along a line. Suppose s (3 )equals 156 and s (6 )equa
bixtya [17]

Answer: The average velocity of the object over the time interval [3,6] is 20.

Step-by-step explanation:

Since we have given that

s(3) = 156

s(6) = 216

We need to find the average velocity over the time interval [3,6].

So, average velocity becomes

\dfrac{s(t_1)-s(t_0)}{t_1-t_0}\\\\=\dfrac{s(6)-s(3)}{6-3}\\\\=\dfrac{216-156}{3}\\\\=\dfrac{60}{3}\\\\=20

Hence, the average velocity of the object over the time interval [3,6] is 20.

5 0
3 years ago
Other questions:
  • I NEED HELP ASAP! THANKS :)
    13·2 answers
  • a school population was predicted to increase by 50 students a year for the next ten years if the current population is 700 stud
    9·2 answers
  • A particular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls invol
    12·1 answer
  • Mr Dominguez spends three weeks training for a marathon. Every day he runs 1/2 mile more than the day before. If the first day h
    13·1 answer
  • 私は助けが必要です..グーグルはこれを翻訳するか、何かをします。私は日本語と英語を話します。please.
    13·1 answer
  • If A = {2, 3, 4, 5} B = {4, 5, 6, 7} C = {6, 7, 8, 9} D = {8, 9, 10, 11}, find (A ∪ B) ∪ C
    13·1 answer
  • Mark opens a bank account with $20. He plans to put in $5 each week.
    14·1 answer
  • -6x - 10 y=-12<br> -12x - 20 y=-24
    15·1 answer
  • Can I get some help please? ASAP <br><br>Solve for X. for both equations pleaseee​
    7·1 answer
  • Calculate the perimeter of the figure
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!