Charlotte has a large container of only red beads. Harry has a large container of only blue beads. Charlotte and Harry swap 30 beads. This means that Charlotte gets 30 of Harry's blue beads in her container and Harry gets 30 of Charlotte's red beads in his container. Charlotte now randomly picks 70 beads from her container and notices that 7 are blue. Harry now randomly picks 60 beads from his container and notices that 45 are blue. If all the beads were placed in one container, work out an estimate for the ratio of red to blue beads. Simplify your answer fully.