A box contains cards number 1-10. A card is drawn at random, then replaced, and a second card is drawn. What is the probability that the first number is a multiple of 5 and the second number is prime?

Question

anonymous · Answer

P(A or B) = P(A) + P(B) - P(A and B)
does this help?

anonymous · Answer

@sourwing yes thanks

anonymous · Answer

uhm... ok. My answer actually didn't help if you noticed it

anonymous · Answer

@sourwing yeah it did i answered the question already

anonymous · Answer

what's your answer?