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A probability problem in high school mathematics
1: The probability of choosing two people from 50 people is 1/25, and the probability of choosing two people from Type A is110, so the probability of choosing two people from 50 people is116544.

2. The probability of choosing two people from 50 people is 1/25, and the probability of choosing two identical people from 50 people is1/20+1/5+110+15.