Explore Westonci.ca, the top Q&A platform where your questions are answered by professionals and enthusiasts alike. Discover precise answers to your questions from a wide range of experts on our user-friendly Q&A platform. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a red marble is 1/9
There are 45 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be.