Who know how to get this answer ?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Evaluate cos2θ for cosθ = square root of 3/2

Ineed i been stuck on this question since yesterday