Solve the problem.
-To get a B in biology, Katie must average 81 on five lab reports. Scores on the first four lab reports were $91,76,77$, and 82 . What is the lowest score that Katie can get on the last lab report and still receive a $B$ ?
A) 82
B) 74
C) 79
D) 81

Question

Quizplus · Accepted Answer

To get a B, Katie must average 81 on five lab reports. The average of the first four lab reports is (91+76+77+82)/4 = 81.5. So, the average of the five lab reports must be 81. This means that the score on the last lab report must be at least 81 - 81.5 * 4/5 = 79.

Solve the Problem 91,76,7791,76,7791,76,77 , and 82 What Is the Lowest Score That Katie Can Get

Solve the Problem $91,76,77$ , and 82 What Is the Lowest Score That Katie Can Get