The college entrance examination is approaching, so we should have a good rest and adjust our schedule and mentality. Relax in the examination room. Eat reasonably in the morning and drink less water.
When you encounter a problem that you can't, skip it decisively and carefully examine the problem. Do what you can, from easy to difficult, and pay attention to time. Prepare the documents and stationery needed for the exam one night in advance.
In fact, the day before the college entrance examination, I decided not to read, relax and have a good rest. I am not nervous about entering the examination room.
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Solution: (1) The number of methods for randomly selecting 2 papers from 50 papers is as follows
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