a student earned on tests the scores of 88, 75, 89, and 81. what is the lowest score the student must get on the next test to keep an average of 80?

Question

anonymous · Answer

can you help on this @jim_thompson5910

jim_thompson5910 · Answer

(88+75+89+81+x)/5 = 88

solve for x

anonymous · Answer

is that suppose to be divided by 5 ? @jim_thompson5910

jim_thompson5910 · Answer

yes, you add up all 5 scores, then you divide by 5 to average them

jim_thompson5910 · Answer

sorry, the equation should be

(88+75+89+81+x)/5 = 80

jim_thompson5910 · Answer

misread but I fixed it

anonymous · Answer

so i got 333.. so then i divide by 5 and i got 66.6 @jim_thompson5910

jim_thompson5910 · Answer

sorry I changed the equation to (88+75+89+81+x)/5 = 80 (misread initially)

jim_thompson5910 · Answer

(88+75+89+81+x)/5 = 80

88+75+89+81+x = 80*5

333+x = 400

x = ???

anonymous · Answer

67 ? @jim_thompson5910

jim_thompson5910 · Answer

yep

anonymous · Answer

ok thanks ... @jim_thompson5910

jim_thompson5910 · Answer

np