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In a group of possible subjects for a research study there are 40 females and 60 males. Twenty of the males are smokers and 10

In a group of possible subjects for a research study there are 40 females and 60 males. Twenty of the males are smokers and 10 of the females are smokers. One subject, "A", will be drawn at random from the group.

What is p(F & S), the probability that A is a female and a smoker?

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