I do need help plz

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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.

Describe how you can act financially responsible.