Question

A student has mean score of 88 on five test taken. What score must she obtain on her next test to have a mean (average) score of 80 on all six test?

Answer 1

88*5= 440
(440+ x)/6= 80
x= 40

Answer 2

thanks a lot!

Answer 3

soory how did you get 40

Answer 4

440+x = 80*6
440 + x= 480
x= 40

Average = total scores / 6 tests
the totals would be 440 + the unknown score, which I named x

Answer 5

Got it thanks!