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Mathematics, 13.12.2020 14:00 jamiesong3501

139 students choose to attend one of three after school activities: football, tennis or running. There are 66 boys.

56 students choose football, of which 28 are girls.

54 students choose tennis.

18 girls choose running.

A student is selected at random.

What is the probability this student chose running?

Give your answer in its simplest form.

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