How many red marbles are there in the jar? How many of them are large?
5/7
Practice makes perfect
We are told that a jar contains 10 large red marbles, 4 small red marbles, 6 large blue marbles, and 5 small blue marbles. We want to know the conditional probability of choosing a large marble given that it is red. To do that we will use the Conditional Probability Formula.
Conditional Probability Formula
For any two events A and B, the probability of B occuring, given that event A has occured, is P(B|A)=P(A andB)/P(A), where P(A) ≠0.
