Question: In a school dormitory, there are 20 students. 6 are compulsive smokers and keep cigarettes in their lockers all the time. One day prefects

In a school dormitory, there are 20 students. 6 are compulsive smokers

In a school dormitory, there are 20 students. 6 are compulsive smokers and keep cigarettes in their lockers all the time. One day prefects decided to check at random on 10 lockers. Required: Find the probability that the prefects will find cigarettes in at least 3 of the lockers. (11 marks)

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