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

Multiple Choice

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