icrobes in a certain colony exposed to radiation have a 1/6 chance of being

mutated.

a. If ten microbes from the colony are sampled, what is the probability that at most 4 will be mutated?

b. If microbe from the colony is examined one by one, what is the probability that the first mutated microbe is the �fifth one that is examined?

c. If microbe from the colony is examined one by one, what is the probability that the �fifth mutated microbes is the tenth one that is examined?