Answer:
Step-by-step explanation:
Given that A game is played as follows:
A coin is flipped 3 times.
If 3 heads come up, then you win $5.
If 2 heads come up, then you lose $5.
If 1 head comes up, then you lose $4.
If no heads (all tails) come up, then you win $4.
No of heads X 0 1 2 3
Prob p 
Win 5 -5 -4 4
Expected win of the game = Sum of win amount * Prob
=
Since expected value is not 0 the game is not fair.