1. In a group of 15 people, 6 are lefties and the rest are right-handed. If 7 people are selected at random, find the pr
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1. In a group of 15 people, 6 are lefties and the rest are right-handed. If 7 people are selected at random, find the pr
1. In a group of 15 people, 6 are lefties and the rest are right-handed. If 7 people are selected at random, find the probability (a) 3 lefties and 4 righties are selected, (b) no lefties are selected, or (3) exactly 1 lefty is selected.