The probability that two people have different birthdays depends on the total number of days in a year and assuming each day is equally likely for a birthday.
If we assume there are 365 days in a year (ignoring leap years for simplicity), the probability that Salma and Mona have different birthdays is:
1 - (1/365)
This is because the probability that Salma and Mona have the same birthday is 1/365, so the probability that they have different birthdays is 1 minus that probability.
So, the probability that both will have different birthdays is approximately 364/365.
