Question

2 questions and i promise to medal and follow

Answer 1

Question 1 (Essay Worth 4 points)

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.

Brenda wrote tally marks for what type of item various customers check out. For books, there are seven groups of 5 tally marks and two individual marks. For videos, there are four groups of 5 tally marks and four individual marks. For magazines, there are three groups of 5 tally marks and four individual marks.

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 2 (Essay Worth 4 points)

Shelly delivers the weekly local paper to neighborhoods in her town. House numbers are even on one side of the street and odd on the other. Shelly delivers an equal number of papers to both sides of the street. Although she always aims for the front doorstep, Shelly typically misses on three of the tosses on her route each week. Design and conduct a simulation to estimate the probability that next week, Shelly's three misses will all be at odd-numbered houses.

Hint: You can set up the experiment using 3 coins to collect the data. Allow one side of the coin to represent Heads (evens) and one other side to represent Tails (odds).

a) Explain clearly your design of the simulation, including choice of probability tool and description of a single trial.
b) Conduct the simulation with twenty trials and record the results.
c) Calculate the experimental probability that all 3 of Shelly's missed papers will be at odd-numbered houses.