Answer: a) 0.07910, b) 0.000976, c) 0.7626
Step-by-step explanation:
Since we have given that
Number of questions = 5
Number of choices = 4
P(getting correct) =
a) the first question she gets right is the 5th question?
P(getting 4 wrongs answers and one right answer) is given by
b) she gets all of the questions right?
P(all right )=
c) she gets at least one question right?
1-P(All of them wrong)
Hence, a) 0.07910, b) 0.000976, c) 0.7626