Detailed Instructions: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Problem:Problem: machine x produces 50 % of the total output and machine - y produces 75 % of the total output. an average of 9 units out of a 1000 goods manufactured by machine - x and two unit of 500 units produced by machine - x prove to be defective. what is the probability that a unit chosen at random from the total daily output of the factory is defective ?
Options: a. 0.008, b. 0.1, c. 0.12, d. 0.006, e. 0.007
Solution:
d