What is the value of a in the equation 5A -10 B equals 45 when b=3

Which choice represents the sample space ,s for this event

Plz a. s. a. p.the table shows the number of male and female contestants who did not win a prize. what is the probability that a randomly selected contestant won a prize, given that the contestant was female? write the probability as a percent. round to the neares tenth, if needed.

Can someone check if i did this correct. it’s number 4 if you’re wondering.