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
ser-zykov [4K]
3 years ago
14

The two-way table shows the results of a recent study on the effectiveness of the flu vaccine. What is the probability that a ra

ndomly selected person who tested positive for the flu is vaccinated? 

Mathematics
2 answers:
Elena L [17]3 years ago
8 0
49 %

465 + 485 = 950

465/950 = .489

.489 * 100 = 48.9, round up for 49 to get 49%, since it's only focused on people who tested positive, you would only have to compare the people in that column


DochEvi [55]3 years ago
4 0

Answer:

The probability that a randomly selected person who is tested positive is vaccinated is:

0.4895

Step-by-step explanation:

We are given a two-way frequency table that represents the result of a recent study on the effectiveness of the flu vaccine.

The table is as follows:

                                  Pos.              Neg.                Total

Vaccinated                465                771                   1236

Not vaccinated         485                 600                 1085  

Total                           950               1371                   2321

Now we are asked to find the probability that a randomly selected person who tested positive for the flu is vaccinated.

Let A denote the event that the person is tested positive.

Let B denote the vent that he/she is vaccinated.

A∩B denote the event that the person tested positive is vaccinated.

Let P denote the probability of an event.

We are asked to find:

P(B|A)

We know that:

P(B|A)=\dfrac{P(A\bigcap B)}{P(A)}

From the table we have:

P(A\bigcap B)=\dfrac{465}{2321}

and

P(A)=\dfrac{950}{2321}

Hence,

P(B|A)=\dfrac{\dfrac{465}{2321}}{\dfrac{950}{2321}}\\\\P(B|A)=\dfrac{465}{950}\\\\P(B|A)=0.4895

Hence, the probability is:

0.4895

You might be interested in
HELP PLEASE Connie can buy 48 roses for $120. Which is the cost per rose? A $1.20 B $2.50 © $3.00 D $4.00​
zubka84 [21]

Answer:

B: $2.50

Step-by-step explanation:

$120 ÷ 48 roses = cost per rose ($2.50)

4 0
3 years ago
Simplify the expression:<br> (2p + 1)(2) =
Oxana [17]

Answer:

4p +2

Step-by-step explanation:

(2p + 1)(2)

Distribute

2p * 2 + 1*2

4p +2

5 0
3 years ago
Read 2 more answers
a force of 2 pounds is needed to stretch a spring 8 inches.what force is required to stretch the spring 16 inches
Korvikt [17]

Answer:

Four (4) pounds

Step-by-step explanation:

Because we required two (2) pounds to stretch the spring eight (8) inches, we need double the force to stretch it sixteen (16) inches. Sixteen is just double the original amount, meaning we need four (4) pounds to stretch the spring sixteen inches.

Hope this helps!

5 0
3 years ago
The air Temperature is -12C at sunrise and rises 4 degrees c every hour for several hours the air temperature after x hours is r
Stolb23 [73]

Let f(x) = y.

y = 4x - 12

Let x = 0

y = 4(0) - 12

y = - 12

This leads to the point (0, -12).

Let y = 0.

0 = 4x - 12

1 2 = 4x

12/4 = x

3 = x

This leads to the point (3, 0).

We now graph both points and then connect each point with a straight line.

4 0
3 years ago
Kim bought four bottles of water and 2 candy bars at a snack shack. Steve bought one bottle of water and 7 candy bars from the s
OverLord2011 [107]

Answer:A

Step-by-step explanation:

1 bottle is 1.50

4*1.50=5

5+1.25= the total

5divided by 7=0.70

Double check your work I’m not sure if I’m right!

5 0
3 years ago
Other questions:
  • Solve problems 3, 7, 15, 17, 19, 20, 21
    13·1 answer
  • What is the value of the expression when x = 4?
    6·1 answer
  • Ms smith has 28 sixth graders and 35 seventh graders for math. If she wants to break the two grades into identical groups withou
    15·1 answer
  • Which step is not necessary when solving this system of equations by graphing? 3x-y=4 x+y= -4
    12·2 answers
  • The diameter of a circle if five times the length of a recatngle. The length of a rectangle is three times the width of the rect
    6·1 answer
  • What is the 98+56-52%=
    10·1 answer
  • Graph y=|3x|-1 I need the graph for this equation
    11·1 answer
  • 1. A waste management service attempts to design routes so that each of their trucks pick-up on average four tons of garbage or
    8·1 answer
  • Identify the domain of the function shown in the graph.
    10·1 answer
  • Find the area of this figure! (Don’t give me a big explanation, i have 30 mins to get this ixl to 90, currently at 74)
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!