A survey of 1,000 people records preferred exercise (run, bike, swim, other) by age band. You meet a respondent who prefers biking. What is the probability they are aged 23 to 27?

1,000 people were surveyed on the exercise they prefer. Of those aged 18 to 22, 54 chose running, 77 biking, 28 swimming and 90 something else. For ages 23 to 27 the counts are 40, 68, 43 and 78; for ages 28 to 32 they are 42, 90, 50 and 71; and for ages 33 to 37 they are 66, 70, 52 and 81. One of the people surveyed tells you they prefer biking. How likely is it that they are aged 23 to 27?