what score does sharon need on the final in order to have an average of an

Question

going into the final exam, which will count as two test scores sharon has test scores of 75,80,70,59,94. what score does sharon need on the final in order to have an average of an

Answer 1

She has scores of: 75,80,70,59,94

The final counts the same as two tests:

 

The average then will consist of scores:  75, 80, 70, 59, 94, x, x

with x representing the grade on the final

 

Your question was cut off but you figure it out simply by taking the

above and setting up to look for an arithmetic average.  Bear in mind,

there will be seven scores to average since the final counts twice.

 

(75+80+70+59+94+2x)/7 = A   were A represents the desired final average

 

Example:  If you want to know what score is needed to end up with a

final average of 80% then

 

(75+80+70+59+94+2x)/7 = 80

 

378 + 2x = 80(7)

378 + 2x = 560

2x = 560 - 378

2x = 182

x = 91

 

The student would need a 91 on the final to achieve a class average of 80