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
sweet-ann [11.9K]
3 years ago
13

A Stats test has 5 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each o

f the 5 questions, what is the probability that you get exactly 2 questions correct
Mathematics
1 answer:
IgorLugansk [536]3 years ago
8 0

Answer:

0.0512

Step-by-step explanation:

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

q = 1 - p = 1 - 0.2 = 0.8

Number of questions, n = 5

Using the binomial probability relation :

P(x = x) = nCx * p^x * q^(n-x)

P(x = 3) = 5C3 * 0.2^3 * 0.8^2

P(x = 3) = 0.0512

You might be interested in
PLEASE HELP ME THIS IS URGENT I AM BEING TIMED!!
morpeh [17]

Answer:

A line has length, but no width or height

Step-by-step explanation:

8 0
3 years ago
What is the average rate of change of the function f(x) =<br> x2 + 4 for 1 Sx &lt;5?
maxonik [38]

Solve the equation for 1 and 5:

1^2 +4 = 1+4 = 5

5^2 + 4 = 25 +4 = 29

Find the difference:

29 -5 = 24

Find the difference of the X values: 5-1 = 4

Rate of change is the change in Y over the change in X:

The rate of change would be: 24/4 = 6

3 0
3 years ago
Find the discriminant of x^2+6x+13=0. What does this number tell you about how many real solutions there are to the equation? Sh
Lana71 [14]
Discriminant = sq root of b^2 - 4*a*c =
sq root of 36 - 4*1*13 =
sq root 36 -52 =
sq root 36 -52 =
sq root -16
There are no real solutions for this equation.  Both roots are complex numbers.








5 0
3 years ago
Read 2 more answers
Q:14 which expression is equivalent to m-4/m+4 divided by (m+2)
jek_recluse [69]
Answer is the first option

6 0
3 years ago
Read 2 more answers
What is the value of the expression (–5) -3? It’s -125
Hoochie [10]

Answer:

Step-by-step explanation:

The correct answer would actually be 15 because (-5) multiplied by -3 makes it positive 15.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Write an expression that can be used to check the quotient of 646÷3
    14·2 answers
  • Which number is irrational? A.0.14, .14 is repeating B. 1/3 C.the square root of 4 D. The square root of 6
    6·2 answers
  • The floor of a rectangle banquet hall has an area of 3,600m2. The length is 90m. What is the width of the banquet hall?
    7·2 answers
  • What is the measurement of angle y?
    10·1 answer
  • Initially a pool contains 340 gallons of water. A hose is placed in the pool, and the water is turned on. The hose adds 5.2 gall
    13·1 answer
  • The word demographic comes from ancient Greece. Demos means people. Graphic means picture. Based on the video and this informati
    5·2 answers
  • A softball player bats in a game. The
    10·1 answer
  • Solve the problem using long division
    12·1 answer
  • How many possible values for y are there where y= Cos -1 0
    15·1 answer
  • If it's $5 for 4 pounds of apples, how much does 1 pound cost?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!