She has to earn on her next assignment to attain an average of 90 for grade 100.
What is the average value?
The average is the middle value of the given data set and is calculated by adding up all the numbers and dividing the result by the total quantity of figures added.
Amy’s current grades for her assignments in math class are 85, 90, 95, and 80.
Let x be the grade she has to earn on her next assignment to attain an average of 90.
The grade does she have to earn on her next assignment to attain an average of 90 is;
[tex]\rm Average =\dfrac{Sum \ of \ all \ grades}{Number \ of \ grades}\\\\ 90 =\dfrac{x+90+85+95+80}{5}\\\\ 90 \times 5 = x+350\\\\450=x+350\\\\x =450-350\\\\x=100[/tex]
Hence, she has to earn on her next assignment to attain an average of 90 for grade 100.
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