SOLUTION: my question is as follow Mr.Doodle's grade distribution over the past 3 years for a cours in college algebra is shown in the chart below A=45 B= 180 C=110 D=95 F= 65 I= 5 If Jane

Click here to see ALL problems on Probability-and-statistics

Question 464110: my question is as follow Mr.Doodle's grade distribution over the past 3 years for a cours in college algebra is shown in the chart below
A=45 B= 180 C=110 D=95 F= 65 I= 5
If Jane plans to take a college algebra course with Mr.Doodle, determine the empirical probability that she recieves a B.
I need step by step answers i DON'T UNDERSTAND HOW THEY CAME UP WITH THE FRACTION 13/120 I THINK THAT IS WHAT I SAW.
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
my question is as follow Mr.Doodle's grade distribution over the past 3 years for a course in college algebra is shown in the chart below
A=45 B= 180 C=110 D=95 F= 65 I= 5
If Jane plans to take a college algebra course with Mr.Doodle, determine the empirical probability that she recieves a B.
---
Total # of grades: 45+180+110+95+65+5 = 500
Total # of B's:: 180
---
Empirical probability of getting a B: 180/500 = 9/25
================================
Cheers,
Stan H.