Respuesta :
Answer:
0.267
Step-by-step explanation:
Van guessed on all 8 questions of a multiple-choice quiz.
Each question has 4 answer choices.
What is the probability that he got exactly 1 question correct.
Probability of right answer=1/4
Probability of wrong answer=3/4
Probability he got only 1 answer right=
Probability first is right all other are wrong+probability second is right all other are wrong+...+probability last question is right all other are wrong
=[tex]8\times \dfrac{1}{4}\times \dfrac{3}{4}\times \dfrac{3}{4}\times \dfrac{3}{4}\times \dfrac{3}{4}\times \dfrac{3}{4}}\times \dfrac{3}{4}\times \dfrac{3}{4}[/tex]
= 0.267
