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
Y_Kistochka [10]
3 years ago
5

Suppose that 1% of the students in a school have head lice and the test for head lice is accurate 75% of the time. What is the p

robability that a student in the school has head lice, given that the test came back positive?,
Mathematics
2 answers:
Pavlova-9 [17]3 years ago
4 0
Answer: There is a 2.9% chance that a person has head lice given that the test is positive. (I know that sounds very low, but watch the math)

Imagine there are 10,000 students in the school. If 1% have lice, that makes 100 students that have it and 9,900 that don't.

Assume the test was given to all students. Out of the 100 that have lice, only 75 would get a positive test because it is only 75% accurate.

Now, out of the 9,900 student who don't have lice, 25% of them would get a positive test, because the test is only 75% accurate. That is 2,475 false positive tests!!!

So we had a total of 2,550 positive tests, but only 75 of those students actually have lice. 75 out of 2550 is 2.9%.


Stells [14]3 years ago
3 0

Answer:

2.9% (APEX)

Step-by-step explanation:

You might be interested in
Each side of a square is increasing at a rate of 4 cm/s. at what rate is the area of the square increasing when the area of the
Iteru [2.4K]
Confusing question but I would get 0, as if you have 4cm, that squared = 16cm^2. Therefore if it were increasing anymore, then you would not be able to get a value of 16.
7 0
3 years ago
Someone please help me
Ugo [173]

Answer:

1,-4

Step-by-step explanation:

I hope it helps because we did that in class

5 0
3 years ago
Scale on map is Lin 86 mi if actual distance is 35 mi . Between two cities how far apart on the map are they
Mrac [35]

Answer:

0.41 cm

Step-by-step explanation:

The scale on the map is 1 in 86 mi.

This means that, 1 cm on the map represents 86 miles in real life, or on earth.

Then we're told that in real life, a distance is 35 miles, and how far they are on the map.

If 1 cm equals 86 miles, then we can say that x cm equals 35 miles

1 cm ----> 86

x cm ----> 35

x * 86 = 35 * 1

x = 35 / 86

x = 0.41 cm

Therefore, they must be 0.41 cm farther or closer apart on the map scale.

5 0
2 years ago
the schools custodian collects all the aluminum cans from the trash cans to recycle he places the cans in paper bags to take to
uysha [10]
I think its 24 ounces. Hope I helped.
5 0
3 years ago
On a 300 point standardized test, Luca earned 82% of the points. How many of the 300 points did Luca earn?
Zina [86]

Answer:

1. He earned 246

82% = 0.82

Move decimal right twice

82 x 300 is 24600

Move decimal left twice

= 246

2. 25

Solve for Y (Total Diamonds)

12 = 48% × Y

12 = \frac{48}{100} × Y

Y = 12 × \frac{100}{48}

Y = 12 × 100 ÷ 48

Y = 25

3.80.95%

Solve for "%"

% = 34/42

% = 0.8095 (rounded)

Convert decimal to percent using percent formula:

% = 0.8095 × 100 = 80.95%

5 0
3 years ago
Other questions:
  • Suppose the pie chart shown represents the monthly budget for a person who maked $2,000 a month. This person decides to rent an
    12·1 answer
  • f(X) = 9x^3 + 2x^2 - 5x^3 - 7x + 4 and g(X) = 5x^3 - 7x + 4. what is f(X) - g(X)? Show all of your steps and write your final an
    10·2 answers
  • What is the measure of EG?
    10·1 answer
  • One number exceeds another by 33.the sum of the number 59
    6·1 answer
  • ________ defines how much the portion is of the base
    10·2 answers
  • Solve each proportion examples 1 and 2 <br> 1.5 6 = 10p p =
    15·1 answer
  • What do you think could reduce the difference? That's the question...Please help me I've been stuck here for hours!
    9·1 answer
  • Use the quadratic formula to determine the exact solutions to the equation.
    6·1 answer
  • If Jo is supposed to read one-half of a 100-page book for an English assignment and she has finished 38 pages, what percent of t
    8·1 answer
  • She figures that the dairy section is at point (5, -6). The produce section is at point (-2, -6). The meat section is at point (
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!