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
spin [16.1K]
3 years ago
14

All athletes at the Olympic games are tested for performance-enhancing steroid drug use. The imperfect test gives positive resul

ts (indicating drug use) for 90% of all steroid-users but also for 2% of those who do not use steroids (that is, the false-positive rate is 2%). Suppose that 4% of all registered athletes use steroids. If an athlete is tested negative, what is the probability that the test is wrong and he or she actually uses steroids?
Mathematics
1 answer:
Nana76 [90]3 years ago
3 0

Answer:

0.4%

Step-by-step explanation:

We have two independent events

  1. The athlete who is being tested for drugs actually is using steroids.
  2. The test went wrong indicating a false result.

The probability of 1) to happen is 0.04 because "4% of all registered athletes use steroids".

The probability of 2) ti happen is 0.1 because "The imperfect test gives positive results (indicating drug use) for 90% of all steroid-users"

Then the probability of 1) and 2) to happen is given by

P=P(1)*P(2)=(0.04)(0.1)=0.004=0.4%

You might be interested in
when a car speed is 24 km/hr a journey takes 80 minutes what must the speed be for the same journey to take 60 minutes?
Mariana [72]

Answer:

32 km/ hr

Step-by-step explanation:

Given that :

Speed of car = 24km/ hr

Time taken =. 80 minutes = 80 / 60 = 1.33333 hours

The distance traveled :

Speed * time

24 km/hr * 1.333333 = 32 km

Speed required to complete 32 km. Journey in 60 minutes = 1 hour

Speed = distance / time

Speed = 32 km / 1 hour

Speed = 32 km/ hr

5 0
3 years ago
At the city museum, child admission is $6.20 and adult admission is $9.50. On Friday, tickets were sold for a total sales of $10
Nostrana [21]

Answer:

98child tickets were sold that day

Step by step Explanation:

Let the number of children= A of the number of adult

Then

6.20C + 9.50A = 1082.0

From the question it was said that four times as many adult tickets as child tickets were sold which implies that number of adult was FOUR times the children, then we can say

A= 4C

Then substitute into the above equation

6.20C + 9.50A = 1082.0

6.20C + 9.50(4C) = 1082.0

6.20C + 38C= 1082.0

44.2C =1082.0

C= 24.48

But we know that

A= 4C

A=4* 24.48

A= 97.9

Therefore ,98child tickets were sold that day

6 0
3 years ago
Area of rectangular solid 2.3 1.8 3.2​
Natalka [10]

2 3 8 is equal to 2.375

Step-by-step explanation:

in fraction form

3 0
2 years ago
Which one of these strategies would eliminate a variable in the system of equations 8x+5y=-7, -7x+6y=-4
salantis [7]

Answer: Multiply the top equation by 6, multiply the bottom equation by -5, then add the equations

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is it equal to?
Alja [10]
Hi!

the answer to your question is 100

3 0
3 years ago
Other questions:
  • Does the function model exponential growth or decay? f(t)=1/4⋅4^t
    7·1 answer
  • The product of -4 and the number is 36 find the number one step equation​
    8·1 answer
  • 9x minus 36 <br><br> Factor out the coefficient of the variable.
    9·1 answer
  • Helppppppp................
    5·1 answer
  • If i were to rotate PQRS 90° counterclockwise, what would be the new coordinates?
    12·1 answer
  • 1. identify the coeffieceint: 6x + 19
    5·2 answers
  • At Bridgeview School, 7/10
    10·2 answers
  • ⚠️⚠️ JUST TELL ME THW SLOPE AND EQUATION ITS MY LAST KNE ⚠️⚠️
    15·2 answers
  • Plzz help. Giving everything.<br> D. 24.5
    8·1 answer
  • Determine f(4)????? ​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!