During a particular week, a community center assigns each of its 240 volunteers to exactly one of two roles: organizing supplies or greeting visitors. Of the volunteers, 90 organize supplies. Of the volunteers who organize supplies, 52 work an evening shift. Of the volunteers who greet visitors, 31 work an evening shift.
If a volunteer is selected at random from the volunteers who work an evening shift that week, which choice is the probability that the selected volunteer organizes supplies?