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Vsevolod [243]
3 years ago
11

A multiple choice test consists of eight questions, each of which has five choices. Each question has exactly one correct answer

.
William guesses randomly at each answer. What is the probability that he gets six or fewer questions correct?
Mathematics
2 answers:
Nesterboy [21]3 years ago
7 0
I dont under standyou
Fed [463]3 years ago
5 0
William has clearly not studied. 

There are five choices for eight questions. The probability of getting a question right is 1 in 5 or 20%. The probability of getting all of them right is 0.00000256. The probability of him 6 or fewer questions correct is over 99% likely. 
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Consider a t distribution with 24 degrees of freedom. Compute P(-1.27˂t˂1.27) . Round your answer to at least three decimal plac
DENIUS [597]

Answer:

Step-by-step explanation:

  1. <em>Use the calculator provided to solve the following problems. </em>
  2. <em> </em>
  3. <em>Consider a t distribution with 24 degrees of freedom. Compute P(-1.27˂t˂1.27) . Round your answer to at least three decimal places. </em>
  4. <em> </em>
  5. <em>Consider a t distribution with 5 degrees of freedom. Find the value of c such that P(t≤c)=0.05 . Round your answer to at least three decimal places.</em>
3 0
3 years ago
Write as an expression: twice the product of the cube of a and the square of b
Tju [1.3M]

Answer:

the square root of 2(x^3 * x^2)

Step-by-step explanation:

twice means 2 and product means either division or multiplication (multiplication in this scenario because twice means multiply).  cubed means to the third power

note i don't know how to put a square root sign so i wrote it out

hope i helped

8 0
3 years ago
Read 2 more answers
Find the circumference of the circle (use 3.14 for pi). Round to the nearest tenth.
stich3 [128]

Answer:

37.7

Step-by-step explanation:

The formula is C = 2 • 3.14 • r , you multiply the radius by pi/3.14, then you multiply that by product by 2.

5 0
3 years ago
Find 2 numbers, if their sum is -11 and their difference is 41
frosja888 [35]

Answer:

  15, -26

Step-by-step explanation:

The <em>generic solution</em> to a "sum and difference" problem can be found easily. Let "a" and "b" represent the numbers you seek, and let "s" and "d" represent their sum and difference:

  a + b = s

  a - b = d

Adding these two equations tells you ...

  2a = s + d

  a = (s + d)/2 . . . . . . divide by the coefficient of a

You can find "b" several different ways. One way is to subtract the second equation from the first:

  2b = s - d

  b = (s - d)/2 . . . . . . divide by the coefficient of b

So, the second number can be found from any of ...

  • b = s - a
  • b = a - d
  • b = (s - d)/2

____

For the numbers given here, s=-11, d=41, the two numbers are ...

  a = (-11 +41)/2 = 15

  b = -11 -15 = -26

The two numbers are 15 and -26.

5 0
3 years ago
55 is 40% of what number
Nutka1998 [239]
First of all, you must change 40% into a decimal by multiplying by 100⇒.40
Then you divide 55 by .40
55÷.40=137.5
Therefore, 55 is 40% of 137.5
6 0
3 years ago
Read 2 more answers
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