Sally is completely unprepared for a three-question multiple-choice pop quiz, so she randomly guesses the answer to each question. if each question has four choices, then what is the probability that she gets all three questions correct?

a) 0.02

b) 0.25

c) 0.42

d) 0.75

Option A) 0.02

Step-by-step explanation:

The probability p that one of the questions is correct is

The number of questions that will answer (number of trials) is .

We want to find out the probability that three questions will be answered correctly.

To calculate this probability we use the binomial formula:

Where

Then:

P(3) = 0.0156≈0.02

the correct option is b

step-by-step explanation:

add a pic of the graph, then ill edit this "answer" and solve it for you : 3

step-by-step explanation: