You will need
  • a sheet of paper
  • handle
Average in mathematics called "arithmetic mean". In order to calculate the arithmetic mean, for a start write down all your numbers on a sheet of paper.
This method is often used in educational institutions for the issuance of quarter grades. For example, the success of the student Vasi Pugovkin in mathematics was extremely doubtful until the teacher was called into school by his parents. Dad did the Bob suggestion, and by the end of the quarter Bob Pugovkin corrected. Look at Wasini assessment: 2 3 3 2 4 4 5 4. That will put teacher Bob for a quarter?
The average arithmetic mean calculated by the formula: the sum of all numbers divided by the number of numbers. Add up all the numbers between them. 2+3+3+2+4+4+5+4 = 27.
Divide the resulting number by the number of Wusinich assessments. 27 divided by 8 equals 3.375. That number is closer to three than to four. Then, the teacher will have to put the Bob the three, despite his recent successes. However, if Bob Pugovkin will get another five, the score will be controversial, as 32:9 is approximately equal to 3.5.