Sam would like to have an average of 86 in his math class. He has completed four assignments with the following grades: 82, 93, 75, 82. What is the lowest grade Sam will need to make on the last assignment to meet his goal?
The lowest grade Sam will need is a 98. This can be solved by multiplying 86 by 5 since you will have to find the average of five numbers. Then you would subtract the previous completed grade so you would subtract 82, 93, 75, and 82 from 430 which was what (86•5) equaled. This would give you your final answer of 98.
