Jamal had a bag of marbles. He had 12 yellow, 10 blue, 5 green and 1 black marbles. He decided to randomly select a ball from the bag. What is the proabilitly that he will draw a black marble?
Choose the correct choice from the following
A) 10 / 28 B) 1 / 28 C) 12 / 28 D) 28 / 1 E) 582 / 695

Rationale: b
Answer: B