Looking for reliable answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Experience the convenience of getting accurate answers to your questions from a dedicated community of professionals. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

A bag contains the following marbles: 3 black marbles, 6 blue marbles, 15 brown marbles, and 24 green marbles. What is the ratio of blue marbles to black marbles? Express your ratio as a fraction or with a colon.