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
anastassius [24]
3 years ago
5

Dalgliesh the detective fancies himself a shrewd judge of human nature. In careful tests it has been discovered that he is right

80 percent of the time when he says that a ran­domly chosen suspect is lying. Dalgliesh says that Jones is lying. The polygraph expert, who is right 100 percent of the time, says that 40 percent of the subjects interviewed by Dalgliesh are telling the truth. What is the probability that Jones is lying?
Mathematics
1 answer:
Dafna11 [192]3 years ago
4 0

Answer:

The probability that Jones is lying is 6/7

Step-by-step explanation:

First we will list out 2 different cases when the outcome is a lie

1.probability that Jones tells lies is = 0.6 and probability that dalgiliesh analyses it correctly is 0.8

So the probability that dagliesh correctly analyses that he is telling lies is 0.8*0.6=0.48

2.Probability that Jones tells truth is 0.4 and if dagliesh analyses it incorrectly (which has a probability of 0.2) the outcome(as analysed by dagiliesh) is a lie

So probability that dagliesh analyses Jones truth as a lie is 0.2*.0.4=0.08

Total probability of outcome being a lie is 0.48+0.08=0.56

But we need the probability of Jones actually saying a lie which is nothing but 0.48/0.56= 6/7

You might be interested in
Alex has a rectangle piece of red paper that is 4 centimeter wide .its length is twice it's width she glues a piece of paper blu
xenn [34]
4cm•2=8cm which is the length of the red paper so therefore Red paper= 4cmx8cm.
Then your going to take 3cm-4cm= 1cm
Next your going to solve for 7cm-8cm=1cm
Which leaves you with an answer of 1cmx1cm more of visible red paper.
8 0
3 years ago
Help me againnnnnnnnnnnnnnnnnnnnnnn
OLEGan [10]

Step-by-step explanation:

(2m + 4) / 8 = w

2m + 4 = 8w

2m = 8w - 4

m = 4w - 2

8 0
2 years ago
Read 2 more answers
Gill creates a model prism using 22 unit cubes. What is the volume of the prism?
jolli1 [7]
You could do V = b × H 2 × 11 = 22
8 0
3 years ago
Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they
AleksAgata [21]
6x+8y=1,200and 150adults
4 0
3 years ago
Help me prove that 2 + 2 is fish.. HELP PLS
Artist 52 [7]

Answer:

NO 2+2 = 22

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • X + 2 = 1 what is it
    13·2 answers
  • Square with side length of 2.8 meters<br><br>​
    7·1 answer
  • The perimeter is 60 cm long how long is one side of the square
    14·2 answers
  • This is unit rates please help me <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bg%7D%7B30%20seconds%7D%20%3D%20%20%5Cfrac%7B20%
    8·2 answers
  • How many yards off the line of scrimmage does the pass rusher need to line up?
    6·1 answer
  • One week Isabella bought 2 bags of apples 3 bags of oranges. Next week she bought 1 bag of apples and 2 bags of oranges what exp
    10·1 answer
  • Given that m angle G- 81", what is m angle I?<br> A)81"<br> B)89<br> C)91<br> D)99
    8·2 answers
  • Is the graph increasing, decreasing, or constant?
    10·1 answer
  • Find the average retail price for a 4-year old V6 four-door sedan with air conditioning, power mirrors, leather seats, power sun
    12·1 answer
  • What is the quotient of the following rational expression?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!