Question

A quiz consists of seven multiple choicequestions. Each question has four choices.A student who forgot to study guessesrandomly on every question. What is theprobability that the student answersexactly five questions correctly?

Answer 1

- The probability of him getting 1 queston correctly given tahat there is only one correct option out of 4 optins,

`\begin{gathered} P(correct)=(1)/(4) \\ \\ P(incorrect)=1-P(correct) \\ P(incorrect)=1-(1)/(4)=(3)/(4) \end{gathered}`

- Since here are questions, it implies that there are multiplye trials the student has.