The table gives information about the number of gold stars won by each of 25 students in class 7T last week. (a) Work out the mean number of gold stars won. (3) A student in class $$\(8 \mathrm{R}\)$$ is to be chosen at random. The probability that this student won at least one gold star last week is 0.39 (b) Work out the probability that this student did not win at least one gold star last week. (1)

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