Question

According to a report from the District Health Secretariat of Barranquilla, the patients who suffer from measles, if they are cared for in a health center, the 2/5 are cured after 20 days. Understanding that the cure of one person is an independent event of the cure of another, of three patients who are currently in the health center, calculate:

a) The probability of being cured at least 1
b) The probability that at least 2 are cured