The answer should be 75/100
Explanation: there are a total of 100 employees so that is the denominator. And we are trying to find the probability of people who are married and/or have a child. We know that 75 are married and 57 have at least one child meaning 57 out of the 75 have a child. So 75 is the numerator bc it accounts for those who are married and have a child. Hope that helps!
