You have the right to make changes and become more assertive. You have the right to say yes or no for yourself without feeling guilty. You have the right to choose not to be assertive.
There are 10 reams of paper in a standard carton of letter-sized Xerox branded paper. However, there are also cartons that hold only 5 reams of letter paper, and larger paper sizes are also packed with a smaller number of reams per carton.
The number of sheets in a ream has varied locally over the centuries, often according to the size and type of paper being sold. Reams of 500 sheets (20 quires of 25 sheets) were known in England in c.1594; in 1706 a ream was defined as 20 quires, either 24 or 25 sheets to the quire.