Question 1065706
average = total/n
27= total/n
after last quiz, his average is (total+67)/(n+1)=32
Therefore, 32 n+ 32=total +67
and 27n=total
So 32 n + 32=27 n +67
5n=35
n=7
He had 189 points in his first 7 quizzes.
after getting a 67, he had 256 points in 8 quizzes, which is 32 average.
If he had gotten a total of 280 points in 8 quizzes, he would have had a 35 average.
He would have needed a 280-189 score or a 91 on his last quiz.