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
strojnjashka [21]
3 years ago
12

Philip ran out of time while taking a multiple-choice test and plans to guess on the last 4 questions. Each question has 5 possi

ble choices, one of which is correct. Let X=, equals the number of answers Philip correctly guesses in the last 4 questions. Assume that the results of his guesses are independent. What is the probability that he answers exactly 1 question correctly in the last 4 questions? You may round your answer to the nearest hundredth.
Mathematics
1 answer:
belka [17]3 years ago
6 0

Answer:

There is a 40.96% probability that he answers exactly 1 question correctly in the last 4 questions.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either it is correct, or it is not. This means that we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which  is the number of different combinatios of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.

In this problem we have that:

There are four questions, so n = 4.

Each question has 5 options, one of which is correct. So

What is the probability that he answers exactly 1 question correctly in the last 4 questions?

This is

There is a 40.96% probability that he answers exactly 1 question correctly in the last 4 questions.

My guess...

⊕⊕⊕

You might be interested in
Write 6×10 to the power of 4 in standard form!<br> Please include an explanation!<br> Thanks!
lidiya [134]

Answer:

60,000

Step-by-step explanation:

Evalute

6 x 10*4

6 x 10,000

60,000 is the standard form :)

3 0
2 years ago
Read 2 more answers
Howard and Jane are surveying their neighbors about the community garden. Their questions, written on the survey, are below:
Sloan [31]

A I think

Step-by-step explanation:

I'm not 100% sure though

8 0
3 years ago
Read 2 more answers
A CD usually sells for $17.00. If the CD is 20% off, and sales tax is 6%, what is the total price of the CD, including tax?
Alinara [238K]

Answer:

14.42

Step-by-step explanation:

17.00 x .80  20% off means price is 80% (or .80) of price

=13.6

13.6 x .06 = .82 sales tax

13.60 + .82 = 14.42 sales price plus sales tax

8 0
2 years ago
I need it by tmr<br> ill give brainliest thx
Zina [86]

Answer:

21. B. Graph Z

23. A. neither function nor relation

24. D. relation only

Step-by-step explanation:

21. Graph Z is the only graph which does not pass the vertical line test

23. The graph does not pass the vertical line test, AND it is not merely given x and y points like a relation. It is graphed as a squiggly line with no given x and y points, therefore you could not make a relation from it either.

24. There is an x value of -4 twice, meaning the set does not pass the vertical line test, HOWEVER, it is a given collection of x and y values, making it a relation.

I would appreciate brainliest, have an amazing day

8 0
3 years ago
Determine whether the forces in the pair are pulling at right angles to each other.
prohojiy [21]

Answer:

C) 3.0

Step-by-step explanation:

Let the length of the other side be x.

Using Pythagoras theorem for right-angled triangle,

4.2^2=2.9^2+x^2

or,x^2=4.2^2-2.9^2

or,x^2=9.23

or,x=√9.23=3.0 units

7 0
3 years ago
Other questions:
  • In a survey of 200 employees, 65% agreed that the management of the cafeteria should be changed. If the confidence interval is 9
    12·1 answer
  • Graph the function f(x)=x^2+4x-12
    11·1 answer
  • Find the solution set of the inequality:<br> -3x + 8 &lt; 15
    6·1 answer
  • What causes the Earth to have magnetic field?
    9·1 answer
  • A rock climber's elevation above sea level changed −8212 feet in 214 minutes as she descended. What was the climber's average ch
    11·1 answer
  • POINTS GIVEN HELP ME PLS POINTS WILL BE GUVEN
    7·1 answer
  • What is the square root of
    7·1 answer
  • Daisy is calculating her assets. She has $10,000 in gold and silver jewelry, and $50,000 in her savings. She has paid $20,000 of
    11·1 answer
  • Please help!<br><br> Are these triangles similar?
    14·2 answers
  • I NEED HELP WITH THISSS PLSSS I HAVE NO IDEA HOW TO DO IT
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!