Final answer:
The set corresponding to the event that exactly one of the five flips comes up heads is option A) {HHHHH, HTTTH, HHTTT}.
Step-by-step explanation:
The set corresponding to the event that exactly one of the five flips comes up heads is option A) {HHHHH, HTTTH, HHTTT}.
This set represents all the possible outcomes where only one out of the five flips is heads. In this case, there are three outcomes where exactly one flip is heads: HHTTT, HTTTH, and HHHHH.