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
taurus [48]
3 years ago
14

Bernice takes a multiple-choice test, each question having 4 choices. If Bernice has no idea of any answer and simply guesses, f

ind the probability that she gets all the questions correct if the test has 1 question, 2 questions, 3 questions 4 questions
Mathematics
1 answer:
hoa [83]3 years ago
6 0

We want to find the probability that Berenice gets all the answers correct.

<u>1 question:</u>

Each question has 4 options, each option has the same probability of being the correct option, so she has a 25% of<u> randomly selecting the correct option.</u>

Then the probability here will just be equal to the number of correct options (1) over the total number of options (4)

p = 1/4

2 questions:

We already know the probability for one question, then the probability of getting two questions correct will be equal to the <u>product of the individual probabilities</u> for each question:

p = (1/4)*(1/4 = 1/16

3 questions:

Similar approach as before:

p = (1/4)*(1/4)*(1/4) = 1/64

4 questions:

p =  (1/4)*(1/4)*(1/4)*(1/4) = 1/256

If you want to learn more, you can read:

brainly.com/question/23044118

You might be interested in
Make g the subject of the formula in w = 7 - sqrt g​
sukhopar [10]

Answer: g = w² - 14w + 49

w=7-\sqrt{g}\\\\=> \sqrt{g} =7-w \\\\g=(7-w)^{2}=49-14w+w^{2}

Step-by-step explanation:

3 0
3 years ago
Suppose the profit a honda dealership makes on the next 5 accords it sells are:564, 1,000, 848, 1,495, 1,348. calculate the stan
stepladder [879]
First we have to find the mean (average)
mean = (564 + 1000 + 848 + 1495 + 1348) / 5 = 5255 / 5 = 1051

now we subtract the mean from every data point, then square it
564 - 1051 = -487......-487^2 = 237169
1000 - 1051 = -51......-51^2 = 2601
848 - 1051 = -203......-203^2 = 41209
1495 - 1051 = 444......444^2 = 197136
1348 - 1051 = 297......297^2 = 88209

now find the mean of the results.....but know when ur dealing with a sample instead of the whole population, u divide by 1 number less...so instead of dividing by 5, u divide by 4.
(237169 + 2601 + 41209 + 197136 + 88209) / 4 = 566324 / 4 = 
141581.....this is called ur variance

now take the square root of the variance and u have ur standard deviation
sqrt (141581) = 376.272 rounds to 376.27 <==
5 0
3 years ago
leonardo read that his reptile food should be given at a temperature of 72.5°F. He keeps the food in the freezer at –4°F. He has
jolli1 [7]

Answer:

9 hours

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
What expression is equivalent to 3(5+4)? A)15+12<br> B)15+4<br> C)8+7<br> D)8+4
valentina_108 [34]

Answer:

A)15+12

hope it helps...

6 0
3 years ago
Read 2 more answers
1. Determine the lateral and total surface
d1i1m1o1n [39]
I hope you find the answer I needed points quickly I’m doing a timed quiz I apologize
4 0
2 years ago
Other questions:
  • Manuel's gas tank is
    10·1 answer
  • Using Euler’s Formula (F + V = E + 2), find the number of edges. Faces: 25 Vertices: 17 Edges: ?
    13·2 answers
  • Il perimetro del rettangolo ABCD è 60 cm e la base è il doppio dell’altezza. Calcola l’area e la misura del contorno della figur
    10·1 answer
  • You are challenged to a lucky draw game. If you draw a face card (K, Q, J) from a standard deck of cards, you earn 10 points. If
    15·1 answer
  • Write words to match the expression.<br><br> 3+(4x12)
    10·2 answers
  • The diameter of a circle is 18 cm what is its area in terms of pi
    14·1 answer
  • How do I get -9-(-14). They are both negatives so I’m confused
    13·2 answers
  • Select the correct answer. Which graph represents the solution to this inequality? A. B. C .
    7·1 answer
  • find the circumference of a circular swimming pool with a diameter of 18 feet use 3.4 as an approximation round your answer to t
    11·1 answer
  • Y′′−4y′+4y=63e^5t with y(0)=3 and y′(0)=4.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!