http://www.cleverscampcamp.com/camping-flashlights/
A friend recently planned a camping trip. He had two flashlights…?
one that required a single 6-V battery and another that used two size-D batteries in his camper. Suppose the probability that any particular camper works is p and that batteries work or fail independently of one another. Our friend wants to take just one flashlight. For what values of p should he take the 6V flashlight?
Im puzzled with this one. thx!
For all values of p.
Because one flashlight uses 2 batteries, the probability of it working is p^2. The probability of the 1 battery flashlight working is p.
For values 0 < p < 1; p > p^2
Sunlite Slim Pocket Flashlight