The table shows your scores on out of quizzes that are each worth points. What score do you need on the final quiz to have a mean score of at least points?
Step 1 : Form an inequality
Let the score in final quiz
From the given data in table the total score on quiz
Mean value
Mean of total score
As given total score should be at least so inequality becomes:
Step 2 : solve the inequality
We have,
[ Multiply both sides by ]
[ Subtract from both sides ]
Hence, we need to score at least points