In a survey, 64% of all airplanes arriving at Nausori airport are late. If 7 airplanes are selected at random, find the probability using the binomial formula that at least 2 will arrive late.
- BaalLv 62 months ago
I don't recall much about binomials 40+ years later, but 64% probability of 7 planes arriving late is 4.48 planes late (7 planes x 0.64 = 4.48). This means 2.52 planes will be on time. I suppose this might mean that 2 whole planes will be on time, 4 planes will be late, and half of one plane will crash to the ground on time while the other half of the plane will fall to the ground some time after the scheduled ETA.