Question

Math 7 Grade 7

Can anyone help me answer these questions? Soon as possible!
I need the answer either dependent or independent.
Introduction to Probability (Independent vs. Dependent) Events


1. Lily picks a marble at random puts it back and then picks another marble at random.

Are these events dependent or independent?


2. Tracy picks a card at random. Without putting the first card back, she picks a second card at random.

Are these events dependent or independent?

Answer 1

The first is independent of one another because the probabilities of picking the marbles doesnt change because the first marble was placed back in. Now the second one is dependent because the first card picked wasnt placed back which changes the probability of the rest of the cards.