Find the probability that the computer is a laptop. Show your work.

In California, Texas, and New York, 40 percent, 25 percent, and 35 percent of computers are built, accordingly. Laptops created in California, Texas, and New York account for 75 percent, 70 percent, and 50 percent of the total.

This possibility can be found near the end of the upper branch. For each of the three age groups, there are three separate paths to "video yes." The probability that an adult Internet user visits video-sharing sites is the sum of their probabilities because the three paths are discontinuous.

The likelihood that the chosen computer is a laptop can be computed as follows: $$\begin{gathered} P\left(Laptop\right)=0.75(0.40)+0.25(0.70)+0.35(0.50) \\ P\left(Laptop\right)=0.30+0.175+0.175 \\ P\left(Laptop\right)=0.650 \end{gathered}$$

As a result, the necessary probability is $0.65$