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.
--------
Question: Problem: the total age of a and b is 12 year more than the total age of b and c. c is how many years younger than a ?
Options: a. 12, b. 24, c. data inadequate, d. none of these, e. 34

Answer: a


Question: Problem: a cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and there by decreases his average by 0.4. the number age of the family now is :
Options: a. 18, b. 17, c. 76, d. 85, e. 86

Answer: d


Question: Problem: the average earning of amechanic for the first 4 days of a week is rs. 25 and for the last 4 days is rs. 22. if heearns rs. 20 on the fourth day, his average earning forthe whole week is ?
Options: a. s. 10, b. s. 24, c. s. 30, d. s. 40, e. s. 50

Answer:
b