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
Oliga [24]
3 years ago
10

On a six-question multiple-choice test there are five possible answers for each question, of which one is correct and four are i

ncorrect. If a student guesses randomly, find the probability of (a) being correct on three questions, (b) being correct on four questions, (c) being correct on all six questions.
Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

Step-by-step explanation:

given that on a six-question multiple-choice test there are five possible answers for each question, of which one is correct and four are incorrect

By mere guessing probability for choosing correct answer = p = 0.2

also each question is independent of the other

Hence if X is the number of correct questions then

X is binomial with p = 0.2 and n = 6

a) being correct on three questions,

=P(X=3) = 0.08192

(b) being correct on four questions,

= P(X=4) = 0.01536

(c) being correct on all six questions

=P(x=6) = 0.000064

You might be interested in
Translate the sentence into an inequality A number c increased by 8 is less than or equal to -19.
givi [52]

Answer:

<u>c + 8 ≤ -19</u>

Step-by-step explanation:

The number c increased by 6 is less than or equal to -19.

<u>c + 8 ≤ -19</u>

<u></u>

6 0
2 years ago
Please Help! I need an explanation for how to do this... Step-by-step directions would be great!
spin [16.1K]
\dfrac{8x^2y^2-4xy^2}{4xy}=\\&#10;\dfrac{8x^2y^2}{4xy}-\dfrac{4xy^2}{4xy}=\\&#10;2xy-y&#10;
8 0
3 years ago
HELP ME PLSSS OMG OMG PLS THIS IS A BIG LART OF MY GRADE ON A TWST AND I RLLY RLLY NEED IT PLE HELP
Elza [17]

Answer: The answer is B.

6 0
2 years ago
Read 2 more answers
Stretch thinking Rewrite this sentence using the word fewer. Carey reads 10more pages than Lucey.
anzhelika [568]

Answer:

Lucey reads 10 pages fewer than Carey.

4 0
3 years ago
You brought 1.5 dozen bagels to school. A dozen bagels cost $5.98. You used a coupon that took $1.00 off of the total. How much
shusha [124]

Answer:   (7.97)

Step-by-step explanation:

1 dozen = 5.98

.5 dozen = 2.99

5.98+2.99=8.79 8.79- the 1.00 is (7.97)

hope this helps!

3 0
3 years ago
Other questions:
  • 2. Geoff planted dahlias in his garden. Dahlias have bulbs that divide and reproduce underground. In the first year, Geoff’s gar
    7·1 answer
  • Koji is installing a rectangular window in an office building. The window is 8 and 2/3 feet wide and 5 and 3/4 feet high
    6·1 answer
  • Evaluate the following expression: 2(1,1) -4(0,1). enter your answer as a vector.
    7·2 answers
  • B. Who spent more of their allowance on pizza? Write an inequality to compare the portion spent on pizza
    15·1 answer
  • (1,-2) y=2x+1 what is the perpendicular line
    9·1 answer
  • The chart below shows the cost of the three different-sized boxes of chicken nuggets that are available at The Chicken Shack.
    9·2 answers
  • Which of the following best describes the graph below?
    7·2 answers
  • Which statement best describe jamies proof
    13·2 answers
  • Event A: lands on a number greater than 4
    15·2 answers
  • 4. Find the value of x.<br> (4x - 10)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!