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
Ostrovityanka [42]
3 years ago
14

HELP!!! HELPPP!!!

Mathematics
1 answer:
mihalych1998 [28]3 years ago
7 0

Answer:

22.75

I did some work to try and find this answer sorry if it is wrong I tried.

You might be interested in
A pharmacist receives a shipment of 21 bottles of a drug and has three of the bottles tested. If five of the 21 bottles are cont
blagie [28]

Answer:

The probability is 0.8722

Step-by-step explanation:

There are 21 bottles

5 of them are contaminated.

there are 21 - 5 = 16 non-contaminated bottles.

So, if we grab a bottle at random, the probability that this bottle is contaminated will be equal to the quotient between the number of contaminated bottles and the total number of bottles, this is:

p = 5/21

Now we want to find the probability that, for 3 tested bottles, that less than two (0 or 1 ) are contaminated.

Let's see each case on its own.

0 bottles:

The probability of getting a non-contaminated bottle in the first try is equal to the quotient between the number of non-contaminated bottles and the total number of bottles, this is:

p₁ = 16/21

For the second bottle is the same, but because one non-contaminated bottle was drawn before, now there are 15 non-contaminated bottles and 20 bottles in total, so now the probability is:

p₂ = 15/20

and similarly, for the third bottle the probability is:

p₃ = 14/19

The joint probability is the product of the individual probabilities, we get:

P = p₁*p₂*p₃ = (16/21)*(15/20)*(14/19) = 0.4211

Now the case that one bottle is contaminated.

Let's assume that the first one is contaminated.

The probability of getting a contaminated bottle in the first draw is equal to the quotient between the number of contaminated bottles and the total number of bottles, so:

p₁ = 5/21

For the second bottle, we want a non-contaminated one, there are 16 non-contaminated bottles and 20 bottles left, so here the probability is:

p₂ = 16/20

and for the third bottle we have the probability:

p₃ = 15/19

The joint probability is:

p = p₁*p₂*p₃ = (5/21)*(16/20)*(15/19)

Also notice that we only looked at the case where the first bottle is contaminated, we also have the case where the second one is contaminated and the case where the third one is  contaminated, so there are 3 permutations, then the probability of having one contaminated bottle is:

Q = 3*p = 3*(5/21)*(16/20)*(15/19) = 0.4511

Then the probability of having less than two contaminated bottles is:

probability = P + Q = 0.4211 + 0.4511 = 0.8722

8 0
2 years ago
Pls help find the angle
Nataly_w [17]
60+x=3x-70
-2x=-130
X=60.5
7 0
2 years ago
Read 2 more answers
Exponents with decimal and fractional base: Evaluate (0.5)2=
Leokris [45]

Answer: Your Answer is 1

Step-by-step explanation:  (0.5) (2)        Imagine your trying to get to the number 1      0.5 is half of one 0.5 x 2 = 1  Hope I helped!!!! (:

8 0
3 years ago
Which property is shown by -6+0=-6?
Rashid [163]
B. Identity Property of Addition

The Identity Property of Addition states that the sum of any number and zero will always be the first number. So -6 + 0 = -6 shows the Identity Property of Addition.
8 0
2 years ago
Point (8 5) was translated as follows (8 5) (2.9) A student wrote the algebraic rule to desenbe the translation
MAVERICK [17]

Answer:

A.

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • What is 20.155 rounded to the nearest tenth is
    13·1 answer
  • Help me please <br> Y=2x+1<br> Y=-2x+1 <br> Y= 2x-1 <br> Y=-2x-1
    6·2 answers
  • What is the approximate area of a circle with a diameter of 28 yards?
    13·1 answer
  • Fred started studying how the number of branches on his tree grows over time. The relationship between the labs time t in years
    13·2 answers
  • |6x-3|+4&lt;19<br> what can x be?
    6·1 answer
  • How can I use models to compare 345 and 391
    9·1 answer
  • Chords and intersect in circle O as shown in the diagram. Two of the angle measurements are marked. What is mCED?
    8·2 answers
  • Madison is making a place mat. She divides it into 6 equal parts to colors. What is the name for the parts?
    6·1 answer
  • What is 14 x 14 x 14 is exponet form
    15·2 answers
  • what are the solutions to this polynominal when s(x) =0 s(x) (3x^2 + 17x+10 )(x-7)(4x-3) enter your answers in the boxes, from l
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!