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.
A ream of paper is a quantity of sheets of the same size and quality. International standards organizations define the ream as 500 identical sheets. This ream of 500 sheets (20 quires of 25 sheets) is also known as a 'long' ream, and is gradually replacing the old value of 480 sheets, now known as a 'short' ream. Reams of 472 and 516 sheets are still current, but in retail outlets paper is typically sold in reams of 500.