Answer:
B) 17 games.
Explanation:
Let g represent the number of games Mark played.
Since there is a $5 entrance fee and each game costs an additional $1.25, we can write the expression:

Which represents that total cost after g games.
Since we know that Mark spent a total of $26.25:

Solve for g. Subtract five from both sides:

And divide both sides by 1.25. Hence:

So, Mark played a total of 17 games.
Our answer is B.