Task: Question Answering
Input (English): Problem: an urn contains 5 red, 6 blue and 8 green balls. 4 balls are randomly selected from the urn, find the probability that the drawn ball are 1 blue and 3 red ?
Options: a. 1 / 969, b. 2 / 969, c. 4 / 969, d. 5 / 323, e. 21 / 789
Output (English): d