Type i light bulbs function for a random amountof time
Chapter 7, Problem 7.64(choose chapter or problem)
Type i light bulbs function for a random amountof time having mean i and standard deviationi, i = 1, 2. A light bulb randomly chosen from abin of bulbs is a type 1 bulb with probability p anda type 2 bulb with probability 1 p. Let X denotethe lifetime of this bulb. Find(a) E[X];(b) Var(X).
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer