Question

8 people have to go to the hospital during a particular week .What is the probability that on atleast one of the days ,atleast two people will go to the hospital?

Answer 1

it is not clear if the question rightly posed..

A person can go to hospital on any of the 7 days.  So 7 ways of doing it.
Eight persons are independent.  So total number of ways in which all people can go to hospital on 7 days of a week are :   7^8.

Atmost 7 people can go to hospital on different days.  So the 8th person has to go to hospital on some day on which another person has already gone to hospital.

SO probability is equal to 1.