Maria placed the letters PROBABILITY into a bag. She will draw a letter, keep it, and draw a second letter. What is the probability that she draws two B's?'

ASAP PLS!!

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint