In Chemistry class, Andrew has earned scores of 64, 69, and 73 on three tests. He must maintain an average of 70 to pass the course. What score must Andrew earn on the final exam to pass the course?

Question

In Chemistry class, Andrew has earned scores of 64, 69, and 73 on three tests. He must maintain an average of 70 to pass the course. What score must Andrew earn on the final exam to pass the course?

Answer 1

400 * 0.7 = 280

64 + 69 + 73 = 206

280 - 206 = 74

Answer 2

To find out what score Andrew must earn on the final exam to pass the course, we need to calculate his average score so far.

First, we add up the scores from the three tests: 64 + 69 + 73 = 206.

Then, we divide the total score by the number of tests to find the average: 206 / 3 = 68.67.

To pass the course, Andrew needs to maintain an average score of 70, which means he needs a total of 70 * 4 = 280 points.

Since Andrew has already earned 206 points, he needs to earn 280 - 206 = 74 points on the final exam to pass the course.

Answer 3

To find out what score Andrew must earn on the final exam, we start by calculating his current average score based on his three test scores.

Step 1: Calculate the sum of his scores.
64 + 69 + 73 = 206

Step 2: Divide the sum by the number of scores.
206 / 3 = 68.67

Andrew's current average score is approximately 68.67.

To pass the course, Andrew needs to maintain an average of 70. Therefore, we need to find out what score he must earn on the final exam to achieve this average.

Step 3: Multiply the desired average (70) by the total number of scores (4, including the final exam).
70 * 4 = 280

Step 4: Subtract the sum of Andrew's current scores from the desired total score.
280 - 206 = 74

Andrew must earn a score of 74 or higher on the final exam to pass the course.