average

     Average is what you get when you add everything together and then divide it up again--like portions of a stew. For example, if you add 6 and 4, you get ten. Divide by the number of "things" you are averaging ( two ), and the average of 6 and 4 is 5. The average of ten and thirty is twenty. The average of 50 and 100 is 75. The average of A and F is C--if half the students in a class get an A, and half get an F, the average grade is a C.
     Averaging works the same way with more than two items--the average of 10, 20, and 30 is 20.  The average of 4, 6, and 11 is 7. The average of two F's and one A is a D. ( two different number scales are used in grading--assuming that F=5, and B=2, the average is 4, or a D . 5+5+2=12. 12/3=4 .
If  F=0, and B=3, the average would still be a D--on this scale a "1". 0+0+3=3. 3/3=1).
 The average of 2 A's and a D is a B.
     Averaging is used for a lot of things--height, weight, age, baseball statistics--anything that can be expressed as a number.