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
marishachu [46]
3 years ago
9

The A.P. Statistics exam consists of a multiple-choice section where each question has five choices. Sara estimates that she has

a 75% chance of knowing each question. If she does not know the answer, she will randomly guess.
a) What is the probability of Sara getting a question correct?

b) The A.P. exam has 40 questions, how many might Sara expect to get correct?
Mathematics
1 answer:
Aleksandr [31]3 years ago
7 0
It's more than 75% because if she knows it that's 75% already, then you add 20% of the 25% she didn't know.
That's .20 • .25 = 0.05 or 5%.
She actually has an 80% chance. 
<span>Then 0.80 • 40</span>
You might be interested in
For each point, identify the axis or quadrant where the point is located. Drag and drop the choices into the boxes to complete t
Radda [10]

Answer:

we need help with the same thing

Step-by-step explanation:

6 0
2 years ago
Please help. If you could/want please explain how you got it you don’t have to though no pressure
Stolb23 [73]

Answer:

x = 5.14

Step-by-step explanation:

Both angles are equal so

5x-6 = 11x-42

42-6 = 11x - 5x

36 = 7x

x = 5.14

4 0
3 years ago
charles leaves the marina and sails his boat 10° west of north for 1.5h at 18km/h. he then makes a right turn to a heading of 60
Ymorist [56]
<span>If Charles leaves the marina and sails his boat 10° west of north for 1.5h at 18km/h, then makes a right turn towards 60° east of north for 1.2h at 20km/h, he is 42 km from his starting point.</span>
5 0
2 years ago
Is it possible to have a playground area made from 70 yards of fencing with an area of 324 square yards? Explain with
cricket20 [7]

Answer:

Yes: The answer would be 113.04 cubic feet

7 0
3 years ago
Combining probabilities is a function of _____.
Romashka-Z-Leto [24]
I think the correct answer from the choices listed above is the second option. Combining probabilities is a function of mutually exclusive events. Joint probability<span> is a measure of two events happening at the same time, and can only be applied to situations where more than one observation can be occurred at the same time.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Divide the following polynomial using synthetic division, then place the answer in the proper location on the grid. Write answer
    6·2 answers
  • Solve and Graph the inequality on a NUMBER LINE ! (Show your work)<br><br> -7&gt;g-21
    8·1 answer
  • A boat traveled 336 miles downstream and back. The trip downstream took 12 hours. The trip upstream took 14 hours. What is the s
    15·1 answer
  • Please answer this question now in two minutes
    6·1 answer
  • Find the value of Z please help
    11·1 answer
  • the linear combination method is applied to a system of equations as shown.4(.25x .5y = 3.75) → x 2y = 15 (4x – 8y = 12) → x – 2
    7·1 answer
  • Solve the inequality. Enter any fractions as reduced improper fractions. 4x ≤ -2/5(6x + 6) The solution is _____​
    14·1 answer
  • Given f(x)=7x-9 and g(x) =x^2, choose the expression for (f*g)(x)
    11·1 answer
  • PLS HELPPPPPP ME!!! ASAP​
    7·1 answer
  • if c=a/b - d-e/f-d, find the value of f when a=3, b=4, c=-6,d=-5 and e=2. step by step explanation plz.​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!