Question

Jason's average(arithmetic mean) on 4 tests is 80.

Assuming he can earn no more than 100 on any

test, what is the least he can earn on his fifth test

and still have a chance for an 85 average after 7

tests?

Answer 1

is it 75?

Answer 2

cause

Answer 3

4 test average = 80--->sum of 4 tests =320
7 test average to be 85---->sum has to be 595
so in 5th test + 6th test + 7th test he needs to score 595-320=275
assuming he earns 100 in both 6th and 7th, the least he wants in 5th is 75.
yes!!

Answer 4

his total score on the first four tests was 320

Answer 5

he could have scored 2 more hundreds on the other tests

Answer 6

and the least he could have gotten would be a 75

Answer 7

yes, u are absolutely correct!

Answer 8

595/7=85 average

Answer 9

ty again, son goku

Answer 10

welcome :)