Step 1 :The question asks for the probability that at least 4 of the selected adults believe in reincarnation. This means we need to find the probability that exactly 4 or all 5 of the selected adults believe in reincarnation. We already have the probabilities for these two scenarios from parts a and b of the question.
Step 2 :We can simply add these two probabilities to get the final answer. The probability that exactly 4 adults believe in reincarnation is 0.077 and the probability that all 5 adults believe in reincarnation is 0.01.
Step 3 :Adding these two probabilities gives us \(0.077 + 0.01 = 0.087\).
Step 4 :Final Answer: The probability that at least 4 of the selected adults believe in reincarnation is \(\boxed{0.087}\).