How to write the steps of the big math probability problem in the new curriculum standard college entrance examination? Is it complicated to write: let ... become event A ... or directly list expressions and permissions? ...
Let's write it ... as event a. Then write p(a)= 1 ...
C stands for the selected project.
If there is a probability, what is the reverse? What score?
Distribution list must be listed.
The second question to copy is ... x = ...
All p's add up to 1.
Ps, we are also prospective candidates ~