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
qaws [65]
3 years ago
8

A quiz consists of 20 multiple-choice questions, each with 5 possible answers. For someone who makes random guesses for all of t

he answers, find the probability of passing if the minimum passing grade is 50 %. Enter your answer in decimal form accurate to six decimal places.
Mathematics
1 answer:
Pavlova-9 [17]3 years ago
7 0

Answer:

0.00259

Step-by-step explanation:

Probability, p of making the correct guess ; 1 / 5 = 0.2

Passing grade = 50% ; 50% * 20 = 0.5 * 20 = 10

q = probability of not passing ;

q = 1 - p = 1 - 0.2 = 0.8

Using the binomial distribution formula :

P(x >=x) = nCx * p^x * (1 - p)^(n - x)

P(x >= 10) = p(x = 10) + p(x = 11)+... + p(x = 20)

P(x >= 10) = 10C20 * 0.2^10 * 0.8^10

P(x >=) 0.00259

You might be interested in
What is the total cost of a $44.55 meal at a restaurant after including a 17% tip? SHOW WORK!
mrs_skeptik [129]

You can solve this in 2 easy steps: 1, multiply 44.55 by .17 (44.55 * .17 = 7.57) then adding the number you get to 44.55 (44.55 + 7.57 = 52.12). Your answer is D.

3 0
3 years ago
Read 2 more answers
Select ALL the correct answers.
DaniilM [7]
Be:
Number of hours: n

<span>The cost of renting a bike for the first hour is $7:
n=1→f(n)=f(1)=$7

</span>He is charged $2.50 for every additional hour of renting the bike:
f(n)=f(n-1)+2.50, for <span>n ≥ 2
</span>
f(1)=7; f(n)=f(n-1)+2.50, for <span>n ≥ 2 (sixth option)
</span>
f(n)=f(1)+2.50(n-1)
f(n)=7+2.50(n-1)
f(n)=7+2.50n-2.50
f(n)=2.50n+4.50 (fifth option)

Answers:
Fifth option: f(n)=2.50n+4.50, and
Sixth option: f(1)=7; f(n)=f(n-1)+2.50, for <span>n ≥ 2</span>
7 0
3 years ago
In the figure below, segment HK and segment IJ intersect at P, and segment HI is parallel to segment Jk. Which of the following
My name is Ann [436]

Answer:

angle PHI

Step-by-step explanation:

Using the alternate interior angle theorem, we can figure out that PHI is congruent to PKJ

4 0
2 years ago
Please help me i cannot understand these Questions
emmainna [20.7K]

Answer:

In the last task, the result is 17+3x/6

Step-by-step explanation:

X+5/3 - 2x-7/6 + x/2

2(x+5)-(2x-7)+3x <em>/</em><em>6</em>

2x+10-2x+7+3x <em>/</em><em>6</em>

17+3x/6

I dunno this task above, I hope this one is correct :))

6 0
3 years ago
What is the approximate percent change in a temperature that went down from 120 degrees to 100 degrees?
Mumz [18]
(120-100)/120
=20/120
=16.66666666
=17%
4 0
3 years ago
Read 2 more answers
Other questions:
  • The caplan family was going to New York City to ring in the New Year. 16 family members each paid $341 for their plane ticket to
    10·1 answer
  • Your basketball team wins a game by 13 points.The opposing team scores 72 points.how to find your teams score
    10·1 answer
  • Jamilla is making a triangular <br> wall
    12·1 answer
  • Which of the following is a solution of x^2-8x=-27
    13·2 answers
  • Please help with this will give you brainliest
    14·1 answer
  • What's 165% as a fraction and decimal
    5·1 answer
  • Janelle earns $12 per hour. What equation can be used to find how many hours Janelle worked if she earned $360?
    8·1 answer
  • A'Niyah deposited $32,720 in a savings account that earns 4% simple interest. A'Niyah has not made any deposits or withdrawls si
    5·1 answer
  • Evaluate x1 - x1 + x0 for x = 2.<br> 0<br> 1/2<br> 1 1/2<br> 2 1/2
    5·1 answer
  • Use your equivalent expression to find the area of Brian's garden, in square feet, if x = 3 and y = 4. 3 points Part A: The area
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!