In my street, people seem to be driving either Mercedes or BMW cars (wish I could afford one!). There are also men and women drivers. The table below is a record of observations over the past week. I peek out through the curtain and write down what I see with a notepad.

Merc BMW

M 45 98

W 81 22

I see a Mercedes coming down the street. What is the probability it has a female driver? Answer as a probability to two decimal places.

Answer: