Let A be the event that a randomly selected two digit number is divisible by 10 and let B be the event that a randomly selected two digit number is divisible by 5. What is P(A and B)?
Choices.
A) 1 / 50  B) 1 / 30  C) 1 / 15  D) 1 / 10  E) 1 / 5

Rationale: p ( a and b ) = 1 / 10 * 1 / 5 = 1 / 50 the answer is a .
Answer: A