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
m_a_m_a [10]
3 years ago
6

Let's say you take a 10 question multiple choice test. Each question has 4 choices and you guess on all of them. What is the pro

bability you get 7 or more right?
Mathematics
2 answers:
AURORKA [14]3 years ago
5 0

In a multiple choice question the probability of success is :  p = 1/4 = 0.25

and the probability of failure is : q = 3/4 =) 0.75

r = 7 ( correct answers )

Probability =  10 C r * ( 1/4 ) ^(10- r) * ˙( 3/4 )^r =

=  10 C 7 * ( 0.25 )^3 * ( 0.75 )^7 = 

= 120* 0,00208568572 =

= 0,2502822864

<u>Answer: Probability is 0,2502822864 or 25.02822864 %.</u>

iren2701 [21]3 years ago
3 0

Answer:25%

Step-by-step explanation:

You might be interested in
453.59 multiplied by 10 carry out to 4 decimal places
zvonat [6]
I believe it should be 45.3590 if not try this answer 453.590 I believe
3 0
3 years ago
Read 2 more answers
What is the answer to this problem triangle
Elza [17]

If both triangles ABE = CBD then <C = <A

Hope it helps.

4 0
3 years ago
Read 2 more answers
0.54 divide 0.03 please Help <br>D:
Helga [31]
It would be 18 I'm sure
4 0
3 years ago
Read 2 more answers
Solve using quadratic formula<br> 1. y=3x^2-x-6<br><br> 2. y=-5x+7x+3
nignag [31]
My estimated answer for 1 is x=1.59 or x=-1.26 and my exact answer is (in word form) x= 1 plus or minus the square root of 73 over 6. my estimated answer for 2 is x=-0.34 or x=1.74 and my exact answer (in word form) is x= -7 plus or minus the square root of 109 over -10. I took a picture of my work and hopefully you can read it

5 0
2 years ago
Pleasee help asap i dont have much time worth 10 points
uysha [10]
The answer is E
step by step explanation:
6 0
3 years ago
Read 2 more answers
Other questions:
  • To kick off the summer, Colton is planning a "School's Out!" party for all his friends. He and his mom pick up a giant sub and a
    12·1 answer
  • Which equations have the same solution? choose all answers that are correct.
    8·2 answers
  • Y=-3/2x+9 2x+2y=16 how to solve it by using substitution
    10·2 answers
  • X y
    5·1 answer
  • Create a pattern for the rule +9
    12·2 answers
  • A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa
    7·2 answers
  • The variables x and y vary directly. Use the values to find the constant of proportionality and write an equation that relates x
    6·1 answer
  • I really need to solve this
    5·1 answer
  • Solve for x: (5 points)
    7·1 answer
  • What is the sum of 57+56​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!