Task: Question Answering
Input (English): Problem: joe ’ s average ( arithmetic mean ) test score across 4 equally weighted tests was 45. he was allowed to drop his lowest score. after doing so, his average test score improved to 50. what is the lowest test score that was dropped ?
Options: a. 20, b. 30, c. 55, d. 65, e. 80
Output (English): b