The people living in two towns, Mumbok and Bagville, are classified by age. The numbers in thousands living in each town are shown in the table below.

Mumbok
Under 18 years:15
18 to 60 years:55
Over 60 years:20
Bagville
Under 18 years:35
18 to 60 years:95
Over 60 years:30

One of the towns is chosen. The probability of choosing Mumbok is 0.6 and the probability of choosing Bagville is 0.4. Then a person is chosen at random from that town. Given that the person chosen is between 18 and 60 years old, find the probability that the town chosen was Mumbok.