In the Probabilities of Multiple Random Experiments #3, we are told to calculate the probability “The probability that an applicant has at least one of the skills.”
The answer to this question is then as follows:
at_least_one_skill <- 0.2 + 0.3 + 0.4 - (0.2 * 0.3) - (0.2 * 0.4) - (0.3 * 0.4) + (0.2 * 0.3 * 0.4)
I don’t understand this at all, and I also don’t even feel like I was prepared to tackle a question like this. We were taught about the addition and multiplication rule, but I just don’t see the logic of how this answer came to be.
Any help would be appreciative.