Question

Rachel has a bag containing 3 red marbles, 5 purple marbles, and 10 blue marbles.

What is the probability that she will pull a purple marble out of the bag? What is the
complement?

Answer 1

5/18, 13/18

Explanation:

The basic probability of anything is Specific Outcome / Total Outcomes

The specific outcome here is pulling a purple marble. We see there are 5 purple marbles therefore there are 5 ways to get them. The total outcomes are the total number of marbles which is 18. Therefore, the answer is 5/18

The complement of a probability is 1 minus the original probability, so, it would be 1 - 5/18 here getting us 13/18 as the answer.