I'm suspicious of the wording ....... I think the question intends you to treat it as a binomial distribution problem but as currently stated it cannot. If the intent is a binomial distribution, then I'd expect the wording to be along these lines:

Before I continue I'll wait for a second opinion.In group of people chosen at random the expected# who wear glasses is 2 and the variance is 1.6.

a.) Find the prob that only one person in the group wears glasses.

b.) Find the prob that six people in the group wear glasses.