Which expression is represented by the diagram? ( Marked 1-4, I can't paste the question.)

-6-(-1)

Step-by-step explanation:

Since all the boxes are negative, and there are 6 boxes, the first part of the equation is -6.  Then since the last box is being taken away, we are subtracting it.  The last box is still negative though so the last part is -1.  Since -6 subtracted by -1 is -6-(-1), the answer is:

-6-(-1)

Total number of youths surveyed = 55

Total number of youths that read electronic books = 32

Total number of adults that read electronic books =33

Total number of adults that read prints = 31

Total number of people surveyed that read print = 54

Step-by-step explanation:

Total number of youths surveyed = total number of those surveyed - total number of youths surveyed =  119 -64 = 55

Total number of youths that read electronic books 55 - 23 = 32

Total number of adults that read electronic books = 65 - 32 = 33

Total number of adults that read prints = 64 - 33 = 31

Total number of people surveyed that read print = 119 - 65 or 23 + 31 = 54