Four logical thinking problems

1 mentioned correct probability. A and b also include the sentence itself, in this case.

A is 60% correct in 60% of cases, that is, 36%, and 40% correct in the remaining 40% cases, that is, 16%, with an average of 26%.

And b is 30% correct in 30% cases, that is, 9%, and 70% correct in 70% cases, that is, 49%, with an average of 29%.

This sentence is six, but this sentence is not six.

3. 1. Need to prove that everyone is out. As long as everyone decides to choose 1 A as the audit object, he is responsible for turning off the lights. Also, when you go out for the first time, turn off the lights and turn on the lights, otherwise you will never come out again. In this way, as long as A records that he turned off the lights 99 times, it can be concluded that everyone turned on the lights! 2. Has this been solved? What is the initial state of the light when the first person goes out, so that when the light is turned on for the first time, A goes out first, and one person will be counted less? This is easy to solve. As long as everyone except A has two chances to turn on the light, when A counts to 197(99*2- 1), everyone can be sure to go out.

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4.a has the lowest hit rate, so it must be left blank.

Thrust: C will definitely hit, so C will hit A or B.

A chooses to give up, and B must strike C with all his might.