A student scored 65, 80, 74 on the first three tests during the term. What does the student need to score on the fourth test to ensure and an average score that is above 75?
4 * 75 = 300
65 + 80 + 74 = 219
300 - 219 = ?
The student needs to score a 81.
The student needs to score a 50.
To find out what score the student needs on the fourth test to ensure an average score above 75, we can use the following steps:
Step 1: Calculate the sum of the three test scores the student already has:
65 + 80 + 74 = 219
Step 2: Determine the number of tests taken so far, which in this case is 3.
Step 3: Calculate the total points possible if the average score is above 75. Since we want the average to be above 75 and we have 4 tests total, we can calculate the total points as follows:
Total points = (number of tests + 1) × desired average
= (3 + 1) × 75
= 4 × 75
= 300
Step 4: Calculate the score the student needs on the fourth test by subtracting the sum of the previous three scores from the total points:
Score needed on the fourth test = Total points - sum of previous scores
= 300 - 219
= 81
Therefore, the student needs to score at least 81 on the fourth test to ensure an average score above 75.