We have looked at the probability that two non-mutually exclusive events A or B can happen in this learning experience.
We will take it one step further and look at the probability that event A or B or C will happen.
The formula is:
P(A or B or C) = P(A) + P(B) + P(C)- P(what a and B has in common) - P(B and C have in common) - P(A and C have in common) + P(A,b,C have in common)
Use the formula to answer the following problem.
The numbers 1 to 40 are all written on slips of paper and placed into a bag. Find the probability to 3 decimal places of drawing a composite number above 20 or multiples of 4 or multiples of 3.