At Most/At least Probability Method 1 vs 2

problem 1 and method 1: Flashcard quiz 16 question 1 problem and method
problem 2 and method 2: Prepswift " At LEAST/MOST Questions" lesson example problem at m:ss 2:09

problem 1 and method 1 pic:

problem 2 and method 2 pic:

Can method 2 be used for problem 1 as long as the probabilities are applied to their respective arrangements?

That seems to be the difference. I’m guessing that:

  • because problem 1 involves equiprobable outcomes, problem 1 can be solved without applying probabilities using method 1. But the tradeoff is that the total number of possible outcomes needs to be calculated.
  • both problem 1 and 2 can be solved using method 2

Aren’t they the same method?