Question

A special deck of cards has 3 blue cards, and 7 orange cards. The blue cards are numbered 1, 2, and 3. The orange cards are numbered 1, 2, 3, 4, 5, 6 and 7. The cards are well shuffled and you randomly draw one card.

B = card drawn is blue
O = card drawn is odd-numbered

a. How many elements are there in the sample space?    

b. P(B) =  

Answer 1