You are going to flip a coin 8 times. The first 3 times you flip the coin you get tails. What is the probability that all the remaining flips will also be tails?
So when you flip the coin 8 times and you get tails 3 of the times then you should do 3 plus 5 and you will get 8 as your total again so then the answer is 5 out of 8 total.