The probability that it is still "MAXAM" after replacement is 0.6, 60.

There are C(5,3) = 10 ways to drop in total. Two of them are the same letters, and eight are different letters. Half of the different letters can be recovered, so P = (2 0.5*8)/10 = 0.6.

Under certain conditions, n tests are repeated. nA is the number of times event A occurs in n tests. If n gradually increases, the frequency nA/n gradually stabilizes around a certain value p. , then the value p is called the probability of event A occurring under this condition, recorded as P(A)=p. This definition became the statistical definition of probability.

Extended information:

Probability is also called "probability". It reflects the probability of a random event occurring. Random events are events that may or may not occur under the same conditions. For example, if you randomly select one product from a batch of genuine and defective products, "the one you get is the genuine product" is a random event. Suppose a random phenomenon is tested and observed n times, and event A occurs m times, that is, its frequency of occurrence is m/n. After a lot of repeated trials, m/n often gets closer and closer to a certain constant. This constant is the probability of occurrence of event A, often expressed as P (A).