In a Gallup Annual Economy and Personal Finance poll, conducted April 3–6, 2014, 21% of adults aged 18 to 29 said that college costs and loans were the biggest financial problem their families were dealing with. Suppose two adults aged 18 to 29 are selected. Find the following probabilities.
a. Both adults will say that college costs and loans are the biggest financial problem their families are dealing with.
b. Exactly one adult will say that college costs and loans are the biggest financial problem their families are dealing with.