Answer:
A. 93.75 words per minute
Explanation:
Ingrid typed a total of 2500 +5000 +3750 = 11,250 words in 300 minutes, for an average speed of 11250/300 = 37.5 words per minute.
Bobby typed a total of 1500 +12000 = 13,500 words in 240 minutes, for an average speed of 13500/240 = 56.25 words per minute.
Their total output was ...
37.5 wpm + 56.25 wpm = 93.75 words per minute