When you cant simplyfy it anymore
-- Avoid foods high in fat.
-- Keep hydrated.
-- Get serious with fruit, vegetables, and exercise.
Answer:
Let x be a random variable representing the length of a text messaging conversation, then
P(x > 3) = 1 - P(x < 3) = 1 - P(z < (3 - 2)/0.5) = 1 - P(z < 2) = 1 - 0.97725 = 0.02275
