Alexa has a mask collection of 300 masks. She keeps some in a display case and the rest on the wall. She keeps 17% of her masks in the display case. How many masks does she keep on her wall?

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)