Answer:
An average reader can read 121.43 words per minute efficiently.
Explanation:
A speed reader can read 850 efficient words per minute.
An average reader can read at approximately 1/7 that speed.
Total word read by an average reader per minute is given = 850* 1/7
= 121.43 words per minute
So an average reader can read 121.43 words per minute efficiently.
