John, bob and jim are brothers. the sum of their ages is 39 years. john is four years younger than bob, and jim is seven years older. how old is each? a. 14, 11, 21 b. 12, 8, 19 c. 11, 9, 20 d. 12, 8, 20

The correct answer would be Choice B. If the sum of their ages is 39 don't rattle your brain trying to calculate the ages of the 3 guy, just add up the 3 ages given in the answer choices and see which one totals out to be 39