Question 8 (8 points) The probability of recall in an experiment is modeled by Pa

Question 8 (8 points) The probability of recall in an experiment is modeled by dc, 0 < c < 1 where x is the percent of recall. What is the probability of recalling between 50% and 80%? Round your answer to three decimal places. O a) 0.387 O O O b) 0.221 c) 0.685 d) 0.173 ) 0.867