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There are 7 people in a room . 4 have exactly 3 siblings while 3 have exactly 1 sibling. If 2 of the 7 are chosen , find the probability that they are not siblings . |
| Answer» There are 7 people in a room . 4 have exactly 3 siblings while 3 have exactly 1 sibling. If 2 of the 7 are chosen , find the probability that they are not siblings . | |