A multiple-choice test offers four possible answers for every question, of which only one is the correct answer. A student guesses on five of the questions. What is the probability that she gets exactly three of the guessed questions correct?
What will be an ideal response?
0.087891
You might also like to view...
Find the absolute extreme values of the function on the interval.F(x) = - 
, 0.5 ? x ? 5
A. absolute maximum is 
at x = 
; absolute minimum is -12 at x =5
B. absolute maximum is - 
at x = 5; absolute minimum is -12 at x = 
C. absolute maximum is - 
at x = 5; absolute minimum is -12 at x = - 
D. absolute maximum is - 
at x = 
; absolute minimum is -12 at x = -5
Calculate the circulation of the field F around the closed curve C.F = (-x - y)i + (x + y)j , curve C is the counterclockwise path around the circle with radius 2 centered at 
A. 8? B. 16? C. 8(1 + ?) D. 8(1 + ?) + 112
Use roster notation to write the set.The natural-number multiples of 7 greater than 20 and less than 106
A. {28, 35, ..., 105} B. {20, 106} C. {21, 28, 35, ..., 105} D. {21, 35, ..., 105}
Using a sum or difference identity, write the following as an expression involving functions of x.sin 
A. -cos x
B. 
cos x + 
sin x
C. 
cos x - 
sin x
D. sin x