# MATH: PROBABILITIES

posted by
**Michelle** on
.

You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.85. With water it will die with probability 0.55. You are 89 % certain the neighbor will remember to water the plant.

You come back from the vacation and the plant is dead. What is the probability the neighbor forgot to water it?