You can
put this solution on YOUR website!Let's make a table of each coin toss and whether its a heads or tail (H or T).
Then in the last column, sum the number of heads in all four tosses.
4 coins with 2 sides gives 16 possible outcomes.
H H H H 4
H H H T 3
H H T H 3
H H T T 2
H T H H 3
H T H T 2
H T T H 2
H T T T 1
T H H H 3
T H H T 2
T H T H 2
T H T T 1
T T H H 2
T T H T 1
T T T H 1
T T T T 0
Of the 16, only 6 have exactly 2 heads.
That means you would win 6/16 times, and lose 10/16 times.
No, the game is not fair to you.
The other player has the advantage.
If it was fair, both would have 8/16 or 1/2 of the possible outcomes.