Brenda is training to be a volunteer at her library. She wonders what the probability is that the first item she'll get to check out for a customer will be a video. So, on her first day of training, she tracks what items are checked out. The results are shown here in a tally chart.

Books:37
Videos:24
Magazines:19

Use Brenda's experimental data to estimate the probability that her first item to check out will be a video. Show and explain your work.

Question

Brenda is training to be a volunteer at her library. She wonders what the probability is that the first item she'll get to check out for a customer will be a video. So, on her first day of training, she tracks what items are checked out. The results are shown here in a tally chart.

Books:37
Videos:24
Magazines:19

Use Brenda's experimental data to estimate the probability that her first item to check out will be a video. Show and explain your work.

anonymous · Answer

add up everything get 37+24+19 = 80

anonymous · Answer

there are 24 videos, and the ratio of videos to total is 
$$\frac{24}{80}=\frac{3}{10}=.3$$