Each visitor to a nature reserve gets a badge with a coloured outline of an animal on it. Zachariah is given a badge at random. The probability that Zachariah's badge has a geer on it is The probability that his badge has a pink deer on it is 3 10 Given that Zachariah's badge has a deer on it, what is the probability that the deer is pink? Give your answer as a fraction in its simplest form.