Answer: 0.6
Step-by-step explanation:
Given : the total number of times a fair coin flipped = 10
The total number faces on a fair coin (Tail/head)=2
Since, the number of times coin lands heads-side up=4
Then , the number of times coin lands on tails = 10-4=6
Now, the experimental probability of the coin landing tails-side up will be :-

Hence, the experimental probability of the coin landing tails-side up = 0.6