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please answer me it's urgent 2) Peter, MJ, and Ned are lining up for a movie with / other people for a total of 10

please answer me it's urgent

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2) Peter, MJ, and Ned are lining up for a movie with / other people for a total of 10 How many ways can they be arranged if a) There are no restrictions? (1 mark) b) None of them will be first? (2 mark) c) What is the probability that Peter, MJ and Ned will be together in some group (2 mark)

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