Intel and AMD compete to put their processing chips into personal computers. In 2014, Intel claimed 93% of the laptop market and 83% of the market for desktop computers. In 2010, Intel commanded 86% of the laptop market and 72% of the desktop market.

(a) What is the probability that someone who bought a laptop in 2010 and again in 2014 purchased computers with Intel chips? Identify any assumptions needed for your answer.

(b) Four customers purchased desktop computers in 2014. What is the probability that all of the computers have Intel chips?

(c) Which changed more from 2010 to 2014 the probability of one customer purchasing a desktop computer with an Intel chip or the probability of four customers all purchasing desktop computers with Intel chips?