Question

Pedro has scores of 84, 85, 83, and 71 after four tests. What score must he make on his fifth test to have an average of 75 or greater?

Answer 1

Pedro needs to score at least 52 on his fifth test to have an average of 75 or greater.

Step-by-step explanation:

To find out the score Pedro needs on his fifth test to have an average of 75 or greater, we can use the formula for average: average = (sum of scores)/number of scores.

Let's calculate the sum of Pedro's scores so far: 84 + 85 + 83 + 71 = 323.

Now, let's set up the equation: (323 + x)/5 = 75, where x represents the score Pedro needs on his fifth test. Simplifying this equation, we get 323 + x = 375. Subtracting 323 from both sides gives us x = 375 - 323 = 52.

Therefore, Pedro needs to score at least 52 on his fifth test to have an average of 75 or greater.

We need to calculate the score Pedro must achieve on his fifth test to attain an average of 75 or greater. First, we add Pedro's current scores: 84 + 85 + 83 + 71 = 323.

Next, we multiply the desired average, 75, by the total number of tests, 5, to find the sum of scores needed: 75 * 5 = 375. To find the score Pedro needs on the fifth test, we subtract the sum of his current scores from this total: 375 - 323 = 52. Therefore, Pedro must score at least 52 on his fifth test to have an average of 75.