Thirty-six of the staff of 80 teachers at a local intermediate school are certified in Cardio-Pulmonary Resuscitation (CPR). In 180 days of school, about how many days can we expect that the teacher on bus duty will likely be certified in CPR?
A) 81 days
B) 65 days
C) 45 days
D) 5 days

Question

Quizplus · Accepted Answer

The probability that a teacher is certified in CPR is 36/80. Multiply this probability by 180 days to find the expected number of days a certified teacher is on bus duty: (36/80) * 180 = 81 days.

Thirty-Six of the Staff of 80 Teachers at a Local