Assume that an unknown bacteria is randomly distributed in a

Assume that an unknown bacteria is randomly distributed in a test tube of nutrient broth at 30 cells/ml. You pipet 0.1 ml onto a nutrient agar petri plate and spread it around. After 48 hours of incubation then:

a.) What is the probability that you have no bacterial colonies on the plate?

b.) What is the probability that you have less than three colonies on the plate?

Solution

The information on the overall area of the nutrient broth is not available. Also, the definition of what forms bacterial colonies is also not give. Thus, the probability of computing no bacterial colonies or less than three colonies is difficult to solve.