Answer:
Explanation:
Problem A
There are four outcomes for the cards
and three outcomes for the marbles
The total number of outcomes is 3 * 4 = 12
Problem B
Now you need 1 in three chances of getting a blue marble while any card will do. So your chances of drawing a blue marble are 1 in 3 and that is your final outcome because the cards don't affect the outcome.
Answer: 1/3