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)5 days
B)45 days
C)65 days
D)81 days

Question

Quizplus · Accepted Answer

The proportion of teachers certified in CPR is 36 out of 80, which simplifies to 9 out of 20. To find out how many days out of 180 a CPR-certified teacher would likely be on bus duty, multiply the total days by this proportion: $180 \times \frac{9}{20} = 81$ days.

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