Question

What is the empirical probability of flipping 4 coins and getting 4 tails?

Answer 1

1/7

Explanation:

There are only 7 possible combinations:
(let T=tail, H=head)

TTTT
HHHH
THHH
TTHH
TTTH
HTTT
HHHT

The result's are like that since when you do it actually, that's the only possible combinations. You won't mind the order, only the number of appearance of either head or tail.