40% of major airline companies equip their planes with wireless internet access. 70% of major airlines offer passengers free on-board snacks. What is the greatest possible percentage of major airline companies that offer both wireless internet and free on-board snacks?  Select: A) 30% B) 40% C) 50% D) 60% E) 70%
To maximize the percentage of companies offering both, let's assume that all 40% of companies which offer wireless internet also offer snacks.   The answer is 40%.
<result>B</result>
40% of major airline companies equip their planes with wireless internet access. 70% of major airlines offer passengers free on-board snacks. What is the greatest possible percentage of major airline companies that offer both wireless internet and free on-board snacks?