Confused as to why my solution is wrong. Here’s what I did:

0.2(0.9)+0.85(0.5)+0.3(x)=0.9

.3x=0.295

x=0.98333…

This is wrong? Why?

Confused as to why my solution is wrong. Here’s what I did:

0.2(0.9)+0.85(0.5)+0.3(x)=0.9

.3x=0.295

x=0.98333…

This is wrong? Why?

Where does the 0.85 come from?

His score on the three highest quizzes divided by the total number of points for all three quizzes. So 51/60

Does 98% *actually* work? Hint: try plugging it back.