A Gas station A charges $3.50 per gallon of gas plus $8 for a car wash. Gas station B charges $3.25 per gallon of gas plus $10 for a car wash. How many gallons of gas must a customer purchase for the total cost to be the same at both gas stations?​

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15