Question

Jaiden made a 54 and an 86 on his first two Biology exams. What must he make on the third exam to achieve an average that is at least an 80?

a. 72
b. 76
c. 80
d. 84

Answer 1

To achieve an average of at least 80 on three exams after scoring 54 and 86 on the first two, Jaiden must score a 100 on the third exam.

Step-by-step explanation:

Jaiden wants to achieve an average score of at least 80 across three Biology exams. We are given that Jaiden scored a 54 on the first exam and an 86 on the second. To find out what Jaiden must score on the third exam, we can set up the following equation:

Average = (First Exam + Second Exam + Third Exam) / Number of Exams

In this case, Jaiden wants the average to be at least 80, so we can set up the equation as:

80 = (54 + 86 + Third Exam) / 3

Multiplying both sides by 3 to eliminate the denominator gives us:

240 = 54 + 86 + Third Exam

Add the known exam scores:

240 = 140 + Third Exam

Now we subtract 140 from both sides to solve for the third exam:

Third Exam = 240 - 140

Third Exam = 100

Thus, Jaiden must score a 100 on the third exam to achieve an average of at least 80.