Will someone just explain this to me? MEDAL!
You are study for your finial exam of the semester. Up to this point, you received 3 exam scores of 84%, 65%, and 90%. To receive a grade of B in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final. Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the the class. Use Interval notation.
A. [78,97]
B. [81,100]
C. [75,100]

Question

Will someone just explain this to me? MEDAL!
You are study for your finial exam of the semester. Up to this point, you received 3 exam scores of 84%, 65%, and 90%. To receive a grade of B in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final. Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the the class. Use Interval notation.
A. [78,97]
B. [81,100]
C. [75,100]

skullpatrol · Answer

Any ideas?

anonymous · Answer

i want to say B  but i'm not so positive about it..

skullpatrol · Answer

Do you recall the definition of the average of a set of numbers?

anonymous · Answer

kinda. i would say i would look it up but i don't want to rely on the internet for everything .-.

skullpatrol · Answer

Then you should find something like a definition in your textbook, right? :-)

anonymous · Answer

i go to an alternative school...we don't have textbooks :( they make us use the internet for EVERYTHING :(

skullpatrol · Answer

Alright, no problem. 

The average of a set of numbers is
 the sum of the numbers divided by the number of numbers.

anonymous · Answer

ooooh ok

skullpatrol · Answer

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