Answer:
A 13.75
Step-by-step explanation:
because you said the you 1 ponit for every right ans and -0.25 for incorret ans so 15 right ans would give you 15 ponits and 5 incorret ans would give you -1.25 so i add up
15+-1.25=13.75 or 55/4
i did do the math so it is right
