Enter your essay, PT and MBE scores in the Exam Score column to calculate your approximate scaled written and scaled total score. The three main measures that summarize the center of a distribution are the mean, median, and mode.Using the table, show probability rule calculations for each of the following. Also identify the type of probability being described. Calculation. Wondering how much alcohol you will need for your next event? 4.1.1 Introduction and Organization. This chapter addresses the requirements for heating, ventilating, and air-conditioning. Take a look at our Financial Calculators page. You'll be amazed at how much more you'll get out of class if you do this. Grades from Spring 1991 to the present are available at MySJSU (Search "MySJSU" in the Search Bar at One.SJSU.edu).