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1.An unbiased coin is tossed 11 times.In how many ways can the coin land tails either exactly 4 times or exactly 2 times? 2. A

1.An unbiased coin is tossed 11 times.In how many ways can the coin land tails either exactly 4 times or exactly 2 times?

2. A firm has 25 senior and 26 junior partners.A committee of three partners is selected at random to represent the firm at a conference.In how many ways can at least one of the junior partners be chosen to be on the committee?

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