Ben has decided to try and make a living buying scratch off lottery tickets. He buys 150 tickets with the intention of scratching each one and calculating the probability in decimal form of matching at least 5 numbers (which is how many matching numbers you need to win some kind of prize, otherwise you win nothing) on his scratch and win ticket. Below are the results he recorded after scratching his tickets. What would his probability of matching at least 5 numbers be?
Angie answered the question below and said (X) = $1.78. She is wrong. Give the correct answer and show your work.
Jacob plans to place ads on 2 separate online sites to generate more traffic for his business. The more people click on these online ads, the more sales you make. Below is a table with data collected, what is the expected value of his sales per click for both ads combined?