MG 620

A student is taking a multiple-choice exam in which eachquestion has four choices. Assume thatthe student has no prior knowledge of the correct answers to any of thequestions. She has decided on a strategy in which she will place four balls(marked A, B,C, D) into a box. She randomly selects one ball for each questionand replaces the ball in the box. The marking on the ball will determine heranswer to the question. There are five multiple-choice questions on the exam.What is the probability that she will get

a.Five questions correct?

b.At least four questions correct

c.No questions correct

d.No more than two questions correct.

This is not Multiple choice question. Ihave to justify andshow the steps for each question either right or wrong.

Thank you